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CBSE Class 12 Pre Board 2025 : Business Studies (Queen Mira International School, Madurai)

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Ezhil roja Sundaravel
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Curriculum Aligned Competency Based Test Items Science Class - 10 Central Board of Secondary Education Table of Contents Test Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Chemical Reactions and Equations .....................................................................................03 Acids, Bases and Salts ........................................................................................................06 Metals and Non-Metals .......................................................................................................10 Carbon and its Compounds .................................................................................................13 Periodic Classi cation of Elements ....................................................................................16 Life Processes .....................................................................................................................19 Control and Coordination ...................................................................................................23 How do Organisms Reproduce? ..........................................................................................26 Heredity and Evolution .......................................................................................................30 Light- Re ection and Refraction ........................................................................................34 The Human Eye and the Colourful World ..........................................................................38 Electricity ............................................................................................................................41 Magnetic E ects of Electric Current ..................................................................................45 Sources of Energy ...............................................................................................................49 Our Environment ................................................................................................................52 Sustainable Management of Natural Resources .................................................................56 Scoring Key 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Chemical Reactions and Equations .....................................................................................59 Acids, Bases and Salts ........................................................................................................62 Metals and Non-Metals .......................................................................................................66 Carbon and its Compounds .................................................................................................69 Periodic Classi cation of Elements ....................................................................................72 Life Processes .....................................................................................................................75 Control and Coordination ...................................................................................................78 How do Organisms Reproduce? ..........................................................................................81 Heredity and Evolution .......................................................................................................84 Light- Re ection and Refraction ........................................................................................87 The Human Eye and the Colourful World ..........................................................................90 Electricity ............................................................................................................................93 Magnetic E ects of Electric Current ..................................................................................96 Sources of Energy..............................................................................................................100 Our Environment ...............................................................................................................103 Sustainable Management of Natural Resources ................................................................106 Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 03 CENTRAL BOARD OF SECONDARY EDUCATION Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 1 Chemical Reactions and Equations When steam is passed through red hot iron, iron oxide and hydrogen gas is formed. The balanced equation for the reaction is shown below. 3Fe + 4H O (Iron) Fe O (water) + 4H (iron oxide) (hydrogen) SAS21S100101 1 Is heating iron to red hot a physical or a chemical change? Explain your answer. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S100102 2 What is true for the balanced chemical equation shown above? A. B. C. D. Four atoms of water combine with iron to form four atoms of hydrogen. Three atoms of iron combine with water to form four atoms of hydrogen. Four molecules of water combine with iron to form an atom of iron oxide. Three atoms of iron combine with water to form one molecule of iron oxide. Cellular respiration is a chemical process by which cells convert glucose to energy. The equation given below shows the reaction for cellular respiration. C H O (glucose) + 6O2 6CO2 (oxygen) (carbon dioxide) Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved + 6H2O + Energy (water) Page 04 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 1 SAS21S100103 3 In the above reaction, which substance is oxidised? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S100104 4 Carbon dioxide and water are the two new substances formed during cellular respiration. What are they known as? A. B. C. D. Reactants Mixtures Catalysts Products A piece of magnesium ribbon is added to a lask containing dilute hydrochloric acid. Hydrogen gas is formed which is collected in the measuring cylinder. The amount of hydrogen formed with time is plotted on a graph. The line on the graph indicates the rate of chemical reaction occurring in the lask. SAS21S100105 5 At what time is the reaction rate the fastest in the lask? A. B. C. D. At 1 minute At 3 minutes At 4 minutes At 6 minutes Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 05 Science Class 10 Chapter 1 Curriculum Aligned Competency Based Test Items SAS21S100106 6 The reaction is repeated with magnesium powder in place of magnesium ribbon under the same conditions. Will the reaction rate increase or decrease? Explain your answer with reference to the volume of hydrogen formed in the lask at 2 minutes. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S100107 7 Which of these could increase the rate of reaction in the lask? Circle Yes or No for each row. Will this increase the rate of reaction? Yes or No Adding more acid to the lask Yes/No Heating the acid in the lask Yes/No Using a higher concentration of acid Yes/No SAS21S100108 8 Magnesium reacts with hydrochloric acid to form magnesium chloride and hydrogen gas. Write a balanced chemical equation to show the reaction. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S100109 9 Which of these is an example of decomposition reaction? A. B. C. D. Melting of glaciers Rusting of old bridges Rotting of fruits and vegetables Absorption of carbon dioxide by oceans SAS21S100110 10 Methane gas released from waste water treatment plants can be used as a source of fuel. Which chemical equation represents combustion of methane to produce heat energy? A. B. C. D. CH4 + CO2 2O2 + 2H2O CH4 + 2O2 CO2 + 2H2O 2O2 + 2H2O CO2 + CH4 CO2 + 2O2 CH4 + 2H2O Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 06 CENTRAL BOARD OF SECONDARY EDUCATION Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 2 Acids, Bases and Salts A pH paper changes its colour depending on the pH value of the substance it is dipped in. The picture shows the di erent colours of a pH paper. Colours shades Leena tested the pH value of four liquids using a pH paper. The table shows the shade of the pH paper after it is dipped separately in the four liquids. Shade of the pH paper Liquid 1 Liquid 2 Liquid 3 Liquid 4 Colour 9 Colour 12 Colour 5 Colour 3 SAS21S100201 1 Which liquid has the lowest concentration of hydrogen ions? A. B. C. D. Liquid 1 Liquid 2 Liquid 3 Liquid 4 Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 07 Science Class 10 Chapter 2 Curriculum Aligned Competency Based Test Items SAS21S100202 2 Leena was advised by her teacher to wear gloves and use forceps while dipping the pH paper in the liquids. What was the reason for this advice? Circle Yes or No to mark your responses. Is the reason correct? Yes or No Gloves keep the hands warm. Yes/No Forceps provide better grip than bare hands. Yes/No Gloves protect hands from corrosive liquids. Yes/No SAS21S100203 3 What should be the colour of a pH paper after it is dipped in distilled water? Explain your answer. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ The equation below shows a chemical reaction. X is a non-metal, but Y is a metal. H X + YOH - YX + HOH YOH YX + HOH SAS21S100204 4 What is the chemical nature of YX? Write your answer in terms of acid/base/salt. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S100205 5 Builders use plaster of Paris to make the surface layer of the inner walls of a building. Which property of plaster of Paris powder makes it a suitable building material? A. B. C. D. It is lightweight. It is white in colour. It is found readily in nature. It gets hard when mixed with water. Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 08 Science Class 10 Chapter 2 Curriculum Aligned Competency Based Test Items Madhav took 10 g of a green salt powder in a covered beaker. He heated the beaker for 15 minutes. Madhav noticed that the salt powder turned whitish after 15 minutes. He also found some droplets on the inner surface of the beaker cover. Madhav added a few drops of water to the whitish powder. The powder turned green. SAS21S100206 6 What can be concluded about the green salt powder from Madhav s activity? Circle Yes or No to mark your responses. Is the reason correct? Yes or No It contains moisture. Yes/No It changes colour on heating. Yes/No It changes to a new chemical on heating. Yes/No SAS21S100207 7 Madhav repeated the same activity but kept the beaker uncovered. Will the results remain the same? Explain your answer. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ Mike placed an electric circuit separately in a dilute acid and a dilute base. Mike observed whether the lamp in the circuit glowed or not for each liquid. Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 09 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 2 SAS21S100208 8 Which property of acids and bases was Mike trying to test through his experiment? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S100209 9 Will the lamp glow if the circuit is placed in distilled water? Explain your answer. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S100210 10 Acid + Metal Salt + X What is X in the equation? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page010 CENTRAL BOARD OF SECONDARY EDUCATION Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 3 Metals and Non-Metals Riya wants to ind out how metal conducts heat. She attaches four nails on a copper rod with wax. Riya heats one end of the copper rod with a lame. SAS21S100301 1 Which nail will fall last? A. B. C. D. Nail 1 Nail 2 Nail 3 Nail 4 SAS21S100302 2 What should Riya keep the same in her activity? A. B. C. D. Length of the nails Material of the nails Thickness of wax coatings Distance between the nails Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 11 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 3 Reena immersed a zinc plate in an aqueous solution of copper sulphate. She noticed a thick layer of copper on the surface of the zinc plate after an hour. Zinc plate CuSO (aq) after an hour blue solution layer of copper on zinc colourless solution SAS21S100303 3 What is the formula of the colourless solution formed after the reaction? A. B. C. D. Zn Cu ZnSO CuSO SAS21S100304 4 What should Reena have done to make the reaction faster? A. B. C. D. Use a thicker zinc plate Use pieces of small zinc lakes Use a copper vessel for the reaction Use copper sulphate solution of higher concentration SAS21S100305 5 No reaction takes place when a copper plate is immersed in an aqueous solution of zinc sulphate. Explain the reason behind this. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S100306 6 What makes gold exist in free state in nature? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S100307 7 2Al + 3H O Al O + X What is X in the reaction? A. B. C. D. Al H O AlH Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 12 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 3 SAS21S100308 8 Which of these is a property of an ionic compound? Circle Yes or No to the correct response. Is this a property of an ionic compound? Yes or No It is insoluble in water. Yes/No It has a high melting point. Yes/No It contains atoms of metal and non-metal. Yes/No The chart shows the process of extraction of some metals. SAS21S100309 9 Which of these metals requires electricity for extraction from its ore? A. B. C. D. Zinc Silver Copper Aluminium The table shows four di erent materials and their resistivity. Number of electrons in the shells of the atom Magnesium (Mg) Sulphur (S) 2, 8, 2 2, 8, 6 SAS21S100310 10 How many atoms of sulphur will react with one atom of magnesium to form a compound? A. B. C. D. One Two Three Four Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 13 CENTRAL BOARD OF SECONDARY EDUCATION Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 4 Carbon and its Compounds The pictures show the bonds formed by the sharing of electrons by the atoms of four di erent molecules. SAS21S100401 1 Which molecule has the strongest bond between its atoms? A. B. C. D. Hydrogen Carbon Nitrogen Oxygen SAS21S100402 2 What is this type of bond between atoms known as? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S100403 3 Which of these is another way of representing the bonds between the atoms of a nitrogen molecule? A. N N C. N N B. N N D. N N Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 14 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 4 SAS21S100404 4 Which of these statements is true about carbon compounds? Circle Yes or No for the correct response. Is this true about carbon compounds? Yes or No They are good conductors of electricity. Yes/No They exist in either saturated or unsaturated form. Yes/No They have lower boiling points than ionic compounds. Yes/No The picture shows the incomplete chain structure of a carbon compound. The second carbon atom has two free electrons. SAS21S100405 5 How many oxygen atoms can combine with the second carbon atom to complete the structure? A. B. C. D. One Two Three Four SAS21S100406 6 Which of these molecules contains a double bond? A. B. C. D. 7 CH C H C H C H A part of a homologous series is shown below. C H , C H , C H SAS21S100407 Which of these compounds is a part of the series shown above? A. B. C. D. C H C H C H C H Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 15 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 4 Four combustion reactions of carbon compounds are shown below. (i) CH + O CO + H O + heat (ii) CH CHO + O CO + H O + heat (iii) CH CH CH OH + O CO + H O + heat (iv) C H + O CO + H O + heat SAS21S100408 8 What can be concluded from the four reactions? Circle Yes or No for the correct response. Can this be concluded from the reactions? Yes or No All carbon compounds release oxygen on combustion. Yes / No All carbon compounds release water on reacting with oxygen. Yes / No All carbon compounds produce carbon dioxide on reacting with oxygen. Yes / No SAS21S100409 9 Which reaction shows the combustion of a type of alcohol? A. B. C. D. Reaction i Reaction ii Reaction iii Reaction iv The picture shows the bonds between atoms in two allotropes of carbon. SAS21S100410 10 Which allotrope is harder? Explain your answer. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 16 CENTRAL BOARD OF SECONDARY EDUCATION Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 5 Periodic Classi ication of Elements SAS21S100501 1 Which scientist irst proposed the periodic table of elements? A. B. C. D. Niels Bohr John Newlands Dmitri Ivanovich Mendeleev Johann Wolfgang Dobereiner SAS21S100502 2 The Law of Octaves stated that when the elements are arranged in the order of increasing atomic masses, every eighth element had properties similar to that of the irst . Why was the Law of Octaves not applicable to all elements? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ The picture shows the modern periodic table. Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 17 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 5 SAS21S100503 3 What do the columns (X) and rows (Y) stand for in the periodic table? X= Y= SAS21S100504 4 Which of these columns in the periodic table contains chemically inert elements? A. B. C. D. X1 X2 X13 X18 SAS21S100505 5 What is the order of arrangement of elements in the periodic table? A. B. C. D. Increase in valency Decrease in atomic mass Increase in atomic number Decrease in the number of atomic shells SAS21S100506 6 What does the position of an element in the periodic table indicate? Circle Yes or No for the correct response. Does the position of an element in the periodic table show this? Yes or No How reactive the element is? Yes/No What is the boiling point of the element? Yes/No What is the number of atomic shells in the element? Yes/No The picture shows an incomplete periodic table. Arrow 1 and arrow 2 indicate increase or decrease in chemical properties. Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 18 Science Class 10 Chapter 5 Curriculum Aligned Competency Based Test Items SAS21S100507 7 What do arrow 1 and arrow 2 represent? Arrow 1 Arrow 2 A. Decrease in atomic mass Increase in atomic radius B. Increase in atomic radius Increase in electronegativity C. Increase in electronegativity Decrease in atomic radius D. Decrease in atomic radius Decrease in atomic mass The picture shows a part of the periodic table. SAS21S100508 8 Which element has the highest metallic property? A. B. C. D. F Al K Fe SAS21S100509 9 Which element shows the properties of both metals and non-metals? A. B. C. D. H Ne Mg As SAS21S100510 10 Which of these oxides is acidic in nature? A. B. C. D. So CaO Al O Fe O Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 19 CENTRAL BOARD OF SECONDARY EDUCATION Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 6 Life Processes The process of iltering blood outside the human body to remove harmful wastes is called Dialysis. Dialysis takes place in an enclosed chamber. The given diagram shows how dialysis works. SAS21S100601 1 Which of the following must be true for a dialysis chamber? Circle Yes or No to indicate your response. Is this necessary for dialysis? Yes or No Used dialysis solution is recycled back to the chamber as fresh dialysis solution. Yes/No The hollow pipes should have semi-permeable walls. Yes/No The blood pressure inside the hollow pipes should be higher than that inside the human body Yes/No SAS21S100602 2 What type of blood vessel brings in the blood with wastes? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 20 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 6 SAS21S100603 3 Which organ acts like a natural dialysis chamber in the human body? A. B. C. D. Heart Brain Kidneys Pancreas Sanjeev wanted to check whether plant leaves release water vapour. He took a potted plant and covered the plant with a plastic bag. The picture below shows what he observed after 2 hours. SAS21S100604 4 Sanjeev compared the results of the activity with a new pot to con irm his indings. Which of the following best represents the new pot? A. B. C. D. SAS21S100605 5 How does the loss of water by plant leaves help the plant? Mention two points. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 21 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 6 Blood transports oxygen and carbon dioxide to di erent parts of the human body. The exchange of gases between blood and inhaled air takes place in the capillaries of lungs. The diagram below shows how blood circulates in the human body. SAS21S100606 6 What statement is supported by the diagram? A. B. C. D. All arteries carry oxygenated blood. Capillaries are permeable to gases. The wall between the left ventricle and the right ventricle is porous. Blood can low back and forth between the right atrium and the right ventricle. SAS21S100607 7 Which of these will be the immediate e ect if gaseous exchange in the lung capillaries reduces? A. B. C. D. Blood will low in the reverse direction. Pulmonary veins will receive blood with less oxygen. The space inside the left and the right atrium will increase. The pressure of blood inside the capillaries will decrease. The diagram below shows the human alimentary canal. 1, 2, 3 and 4 are four di erent organs that are parts of the canal. Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 22 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 6 SAS21S100608 8 Which of the labelled parts represents the liver? A. B. C. D. 9 1 2 3 4 SAS21S100609 Pancreas secretes lipase enzyme. Mr. Ayub is su ering from malfunctioning of the pancreas. Which of the following will be adversely a ected in Mr. Ayub s body? A. B. C. D. Digestion of carbohydrates Digestion of proteins Digestion of fats Digestion of vitamins Small hair-like structures line the upper part of the human respiratory tract. These structures trap the dust particles, germs and chemicals entering the human body during breathing. SAS21S100610 10 Smoking is likely to cause infections in the respiratory tract. Which statement best explains the fact? A. B. C. D. Smoking destroys the hair-like structures. Smoking causes excessive growth of the hair-like structures. Smoking stimulates the hair-like structures to release harmful chemicals. Smoking makes the hair-like structures wet and they fail to trap dust particles. Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 23 CENTRAL BOARD OF SECONDARY EDUCATION Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 7 Control and Coordination The igure shows the movement of a stem. X is a part of the stem. The movement of plant hormone auxin in cells regulates cell elongation and growth of plants in a particular direction. SAS21S100701 1 What would the size of cells and the distribution of auxin at part X of the stem look like? A. B. C. D. SAS21S100702 2 How can the movement of the stem in a particular direction be described? A. B. C. D. Against gravity Away from touch Away from chemicals Towards a source of water Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 24 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 7 SAS21S100703 3 Cell division in plants is promoted by _______________________. A. B. C. D. Auxin Abscisic acid Cytokinins Gibberellins The igure shows a re lex arc formed in response to heat. SAS21S100704 4 Which of these is the correct sequence of the low of information in the re lex arc? A. B. C. D. Sensory Neurone Receptor Motor Neurone Relay Neurone E ector Receptor Sensory Neurone Relay Neurone Motor Neurone E ector Sensory Neurone Receptor Motor Neurone Relay Neurone E ector E ector Motor Neurone Relay Neurone Sensory Neurone Receptor SAS21S100705 5 What is labelled as X in the igure? A. B. C. D. Cerebrum Spinal cord Pituitary gland Hypothalamus The graph shows the average height of boys and girls in a population. Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 25 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 7 SAS21S100706 6 What does the graph indicate? A. B. C. D. The average height of boys is always greater than that of girls. The average height of girls is greater than that of boys in adulthood. The average height of girls during puberty is greater than that of boys. The average heights of girls and boys are the same between 4 and 20 years. SAS21S100707 7 A student suggested a di erent title for the graph - Height of boys and girls from birth to adulthood . Is the title correct? Explain your answer. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S100708 8 Which of the following statements are correct? Circle Yes or No to mark your response. Statement Yes or No Hormones are released directly into the bloodstream. Yes/No Endocrine glands use electrical impulses. Yes/No Sex hormones regulate changes associated with puberty. Yes/No SAS21S100709 9 The cerebellum in the brain controls voluntary actions of the body. Which of these actions is controlled by the cerebellum? A. B. C. D. Beating of the heart Blinking of the eyes Watering of the mouth Jumping from a height SAS21S100710 10 Which of these health conditions is caused by a hormonal imbalance in the body? A. B. C. D. Scurvy Typhoid Diabetes Common cold Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 26 CENTRAL BOARD OF SECONDARY EDUCATION Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 8 How do Organisms Reproduce? The diagram shows four di erent populations of a freshwater ish. All ish belong to the same species but with two di erent adaptations. Population 1 Population 2 Population 3 Population 4 = can survive in both freshwater and slightly saline water, cannot tolerate temperatures beyond 25 = can survive only in freshwater, can tolerate temperatures up to 35 SAS21S100801 1 Which population is most likely to survive a small increase in water salinity in its habitat? A. B. C. D. Population 1 Population 2 Population 3 Population 4 Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 27 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 8 SAS21S100802 2 Which of these is responsible for the di erence in adaptation within the ish species? Circle Yes or No to mark your response. Is this responsible for the di erence in adaptation? Yes or No Di erence in food source Yes/No Variations in DNA Yes/No Di erence in age Yes/No The ish with di erent adaptations were put in two separate tanks of water. Tank 1 Tank 2 SAS21S100803 3 The water in both tanks was saline and maintained at 35 . Will the ish in each tank survive after a week? Explain your answer. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ Medha cut a celery plant into two pieces. She placed the lower part of the cut celery in a jar of water. The pictures show what Medha observed after a week. Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 28 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 8 SAS21S100804 4 What can Medha conclude from her activity? A. B. C. D. Some plants can regenerate. Some plants grow best indoors. Some plants can grow without sunlight. Some plants need both male and female organs to reproduce. SAS21S100805 5 Scientists grow new plants from groups of cells in laboratories. What is the technique known as? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ The table lists the development of few characteristics in the human body. Characteristics growth of thick hair in the armpits of both males and females cracking of voice in males development of breasts in females SAS21S100806 6 At which stage of human development do the above characteristics appear? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S100807 7 Which of these statements is true for the characteristics listed in the table above? Circle Yes or No to mark your response. Is this statement true? Yes or No The characteristics generally develop earlier in girls than boys. Yes/No The characteristics develop over a span of few years. Yes/No The characteristics last for a short time. Yes/No Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 29 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 8 The diagram shows the reproductive system of a human female. 1, 2, 3 and 4 are four di erent parts of the system. SAS21S100808 8 Fertilisation is the union of a sperm with a mature egg. In which part of the female reproductive system does fertilisation take place? A. B. C. D. 1 2 3 4 SAS21S100809 9 What is the number of sperm(s) that fertilise one egg? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S100810 10 Which of the following diseases is caused by a sexually transmissible bacterium? A. B. C. D. Wart Cholera In luenza Gonorrhoea Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 30 CENTRAL BOARD OF SECONDARY EDUCATION Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 9 Heredity and Evolution A plant with red lower (Rw) is cross bred with a plant with white lower (ww). There are two variations of the gene controlling the colour of the lower. The gene for red lower (R) is dominant over that for white lower (w). The Punnett square shows the result of the cross. w w R Rw Rw w ww ww SAS21S100901 1 What percentage of the plants is likely to produce white lowers? A. B. C. D. 25% 50% 75% 100% Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 31 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 9 SAS21S100902 2 A red lower plant (RR) was cross bred with a white lower plant (ww). What will be the colour of the lower of the next generation plants? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S100903 3 What would have caused the variation in the gene for lower colour? A. B. C. D. Mutation Pollination Speciation Adaption The picture shows di erent layers of rocks with fossils dug out from two di erent places. SAS21S100904 4 Which layer of rocks contains the youngest fossil? A. B. C. D. Layer 1 Layer 5 Layer 6 Layer 10 SAS21S100905 5 Which layers of rocks must have formed during the same time period? A. B. C. D. Layer 1 and Layer 6 Layer 3 and Layer 9 Layer 4 and Layer 8 Layer 5 and Layer 10 Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 32 Science Class 10 Chapter 9 Curriculum Aligned Competency Based Test Items The picture shows the inheritance of an X chromosome-linked trait in a family. There are two variations of the trait - X and x. The trait is recessive, and a ected individuals carry two copies of the recessive gene. SAS21S100906 6 Which of the following is the correct genotype of the mother and the father? Mother Father A. XX XY B. xx XY C. Xx xY D. xx xY SAS21S100907 7 Which of these traits is acquired by a human population in response to the environment? A. B. C. D. Short hair Body mass Tall height Brown eyes The picture shows two species of birds living in di erent regions. Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 33 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 9 SAS21S100908 8 Which of the following is the correct genotype of the mother and the father? A. B. C. D. They cannot interbreed. They are not similar in shape. They live in di erent geographical areas. They have di erent mutations in their genes. The two birds once belonged to the same species. The following sequence of events is likely to have caused the origin of the two di erent species. SAS21S100909 9 What is the biological event X? A. B. C. D. Evolution Speciation Changes in DNA Sexual reproduction SAS21S100910 10 Which of the following statements is correct? Circle Yes or No to mark your responses. Is this statement correct? Yes or No Natural selection provides an advantage to organisms. Yes/No Genes mix with each other to produce new traits Yes/No All chromosomes in human cells are found in pairs. Yes/No Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 34 CENTRAL BOARD OF SECONDARY EDUCATION Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 10 Light- Re lection and Refraction The pictures show four ray diagrams of images formed by concave mirrors. P is the pole or centre of the re lecting surface of the mirror. C is the centre of curvature of the mirror. F is the focus of the mirror. AB is the object and A B is the image of the object. Diagram 1 Diagram 2 Diagram 3 Diagram 4 SAS21S101001 1 Which of these can be concluded from diagram 1? A. B. C. D. Image is formed at the focus. Size of the image is equal to the size of the object. Distance between pole and centre of curvature is twice the focal length. Distance between the image and focus is half the distance between the object and focus. Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 35 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 10 SAS21S101002 2 Which diagram shows a real, inverted and enlarged image formed by the mirror? A. B. C. D. Diagram 1 Diagram 2 Diagram 3 Diagram 4 SAS21S101003 3 In which condition does a concave mirror produce a virtual image? A. B. C. D. When object is located within the focal length When object is located at the centre of curvature When object is located in between in inity and the centre of curvature When object is located in between the centre of curvature and the focus SAS21S100604 4 Solar cookers contain a concave mirror. How does the concave mirror help in heating the food? Circle Yes or No for the correct response. How does the concave mirror heat the food? Yes or No Sun s rays are absorbed by the mirror. Yes/No Sun s rays re lected by the mirror converge at a point. Yes/No Sun s rays diverge out when re lected by the mirror. Yes/No The pictures show the ray diagrams of images formed by convex mirrors. P is the pole or centre of the re lecting surface of the mirror. C is the centre of curvature of the mirror. F is the focus of the mirror. AB is the object and A B is the image of the object. Diagram 1 Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Diagram 2 Page 36 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 10 SAS21S101005 5 Which statement is supported by the two diagrams? Circle Yes or No for each statement. Is the statement supported by the two diagrams? Yes or No Convex mirrors produce virtual images Yes/No Convex mirrors produce erect images Yes/No Convex mirrors have their focus behind the mirrors Yes/No SAS21S101006 6 Which of these is a convex mirror? A. B. C. D. Shaving mirror Dentist s mirror Headlight mirror of a bike Rear-view mirror of a car SAS21S101007 7 A mirror magni ies the image of an object by minus 1.5 times. Which of the following is true about the image produced by the mirror A. B. C. D. The image is real and larger than the object. The image is real and smaller than the object. The image is virtual and larger than the object. The image is virtual and smaller than the object. The table below shows the refractive index of di erent materials. Refractive index of the material Water Kerosene Flint glass Diamond 1.33 1.44 1.65 2.42 The formula for calculating the refractive index (nm) of a material is, n Speef of light in X Speef of light in the medium SAS21S101008 8 What does X stand for? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 37 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 10 The picture shows the path of light as it travels from one medium to another. Medium 1 Medium 2 SAS21S101009 9 What is medium 1 and medium 2? Medium 1 Medium 2 A. Water Kerosene B. Kerosene Diamond C. Flint glass Water D. Kerosene Flint glass SAS21S101010 10 The power of a lens (P) is calculated by the formula, P= 1 f where f is the focal length of the lens. A lens has a focal length of 0.25 m. Is it a convex lens or a concave lens? Explain your answer. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 38 CENTRAL BOARD OF SECONDARY EDUCATION Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 11 The Human Eye and the Colourful World The diagram shows how a human eye sees a candle. SAS21S101101 1 What is X? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S101102 2 Which part of the eye produces maximum refraction of light rays? A. B. C. D. Lens Pupil Retina Cornea Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 39 Science Class 10 Chapter 11 Curriculum Aligned Competency Based Test Items SAS21S101103 3 What type of image is formed on the retina? A. B. C. D. Virtual and inverted Real and inverted Virtual and erect Real and erect SAS21S101104 4 What would the size of the image formed on the retina depend on? A. B. C. D. Age of the person Curvature of the lens ocal length of the lens Distance of the candle from the eyes SAS21S101105 5 Which eye is likely to be in the brightest light? A. B. C. D. SAS21S101106 6 Which part of the eye controls the size of the pupil? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S101107 7 Presbyopia is a defect in vision. What is the primary cause of presbyopia? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 40 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 11 SAS21S101108 8 A young person can clearly see nearby objects but not distant objects. Which of these statements is true for the person? Circle Yes or No to mark your responses. Is this statement correct? Yes or No His eye lens is not lexible. Yes/No His eyeballs are elongated. Yes/No All chromosomes in human cells are found in pairs. Yes/No A ray of light passes through a glass prism. SAS21S101109 9 When do the light rays get refracted? Circle Yes or No to mark your responses. When do the light rays get refracted? Yes or No As the light ray enters the prism from the air Yes/No As the light rays travel inside the prism Yes/No As the light rays move from the prism into the air Yes/No SAS21S101110 10 Why do leaves appear green? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 41 CENTRAL BOARD OF SECONDARY EDUCATION Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 12 Electricity The table shows four di erent materials and their resistivity. Material Resistivity( m) Material 1 1.62 10-8 Material 2 100 10-6 Material 3 6.84 10-8 Material 4 44 10-6 SAS21S101201 1 Which material is the best conductor of electricity? A. B. C. D. Material 1 Material 2 Material 3 Material 4 SAS21S101202 2 What is the SI unit of Resistivity? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S101203 3 Why is nichrome wire used in many electrical heating devices? A. B. C. D. It has low resistivity and low melting point. It has high resistivity and low melting point. It has low resistivity and high melting point. It has high resistivity and high melting point. Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 42 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 12 SAS21S101204 4 What does the symbol mean in an electric circuit? A. B. C. D. Switch Wire joint Electric bulb Variable resistance SAS21S101205 5 A current of 1A lows through an electric bulb for 5 minutes. What is the amount of electric charge that lows through the bulb? Show your calculation. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S101206 6 Which of these decides the resistance of a wire? Circle Yes or No for correct response. Does this a ect the resistance? Yes or No Length of the wire Yes/No Thickness of the wire Yes/No Material of the cover on the wire Yes/No The picture shows an electric circuit. Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 43 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 12 SAS21S101207 7 Which of these is true about the circuit? Circle Yes or No for correct response. Is this true for the circuit? Yes or No The circuit is open. Yes/No The circuit has double batteries. Yes/No The circuit has an ammeter and a voltmeter parallel to each other. Yes/No SAS21M10Q0108 8 Will there be any change in the ammeter reading if the length of the wire in the circuit is doubled? Explain your answer. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ Leena creates an electric circuit with three resistors R1, R2 and R3. SAS21S101209 9 What is the equivalent resistance of the circuit? A. B. C. D. 3 4 5 9 Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 44 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 12 The same resistors are connected in a parallel combination in the circuit. SAS21S101210 10 What is the equivalent resistance of the circuit? A. B. C. D. Less than 1 1 2 More than 2 Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 45 CENTRAL BOARD OF SECONDARY EDUCATION Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 13 Magnetic E ects of Electric Current SAS21S101301 1 Which of these magnets has the strongest magnetic ield? A. B. C. D. SAS21S101302 2 Which of these statements is true for the lines of a magnetic ield? Circle Yes or No for the correct response. Is the statement true? Yes or No Lines of a magnetic ield can sometimes cross each other. Yes/No Lines of a magnetic ield emerge from the north pole and meet at the south pole. Yes/No Lines of a magnetic ield can sometimes change direction. Yes/No Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 46 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 13 Reema placed a magnetic needle in an electric circuit. She noticed a de lection of the needle when the circuit is turned ON. SAS21S101303 3 Reema placed a second battery in the circuit and turned the circuit ON. What change in the needle will she observe now? A. B. C. D. The needle will keep spinning. The de lection of the needle will increase. The de lection of the needle will decrease. There will be no change in the de lection of the needle. SAS21S101304 4 Reema reverses the direction of the battery in the circuit. She turns the circuit ON. Draw an arrow on the magnetic needle to show the correct de lection. Sonia creates four electromagnets by placing iron bars in four di erent solenoids. She brings a bunch of steel pins near each electromagnet. Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 47 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 13 SAS21S101305 5 Which electromagnet will attract the maximum number of pins? A. B. C. D. Electromagnet 1 Electromagnet 2 Electromagnet 3 Electromagnet 4 SAS21S101306 6 Which of these must Sonia keep the same for her activity? Circle Yes or No for the correct response. Should this be kept the same? Yes or No Thickness of the wires Yes / No Voltages of the batteries Yes / No Thickness of the iron bars Yes / No SAS21S101307 7 Label the north pole and south pole of the electromagnet in the diagram. SAS21S101308 8 Which of these devices works due to the magnetic e ect of electric current? A. B. C. D. LED bulb Electric bell Electric heater Mobile charger Leena creates an electric circuit with three resistors R1, R2 and R3. Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 48 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 13 SAS21S101309 9 Which wire should be connected to the negative terminal of a socket? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ Electrical devices often have an ampere marking to indicate the strength of electric current required for it to work. SAS21S101310 10 Will there be any change in the ammeter reading if the length of the wire in the circuit is doubled? Explain your answer. A. C. Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved B. D. Page 49 CENTRAL BOARD OF SECONDARY EDUCATION Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 14 Sources of Energy SAS21S101401 1 Which source of energy for cooking will produce the least air pollution? A. B. C. D. Petrol Coal LPG Wood The picture shows how sunlight heats the water in a solar water heater. SAS21S101402 2 When will the solar water heater work most ef iciently? A. B. C. D. At noon under a clear sky At noon under a cloudy sky In the morning under a clear sky In the morning under a cloudy sky Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 50 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 14 SAS21S101403 3 H + H X + n What is the formula for X in the given reaction? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S101404 4 Which type of energy is derived from the sea? A. B. C. D. Tidal energy Wind energy Nuclear energy Thermal energy SAS21S101405 5 Which source of energy emits large amounts of greenhouse gases? A. B. C. D. Sun Coal Wind Water SAS21S101406 6 Which of these statements is true about biogas? Circle Yes or No for correct response. Is this statement true about biogas? Yes or No It contains poisonous chemicals. Yes/No It contains 75% methane. Yes/No It is produced in the absence of oxygen. Yes/No The diagram shows the formation of fossil fuels. ~ 300 to 400 million years ago Aquatic plants and animals die and are buried on the ocean loor by layers of sand and silt ~ 50 to 100 million years ago Layers of sediment are deposited above and the pressure and heat caused compaction of the remains Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved present time the remains become oil and gas which are forced out of porous rock to form deposits which we drill for Page 51 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 14 SAS21S101407 7 What is the minimum time required for marine organisms to transform into fossil fuels? A. B. C. D. Less than 100 million years 100 - 200 million years 200 - 300 million years More than 300 million years SAS21M10Q0108 8 Name any three examples of fossil fuels. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S101409 9 How are the wastes discharged from a biogas plant reused? A. B. C. D. As clay for pottery As fuel for cooking As food for animals As manure for plants SAS21S101410 10 Which of these is true about fossil fuels? Circle Yes or No for correct response. Is this statement true for fossil fuels? Yes or No Formation of fossil fuels requires heat and pressure. Yes/No Fossil fuels have no alternatives as energy source. Yes/No Fossil fuels are non-conventional source of energy. Yes/No Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 52 CENTRAL BOARD OF SECONDARY EDUCATION Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 15 Our Environment The table shows some organisms and their food sources in an ecosystem. Organism Food source Frog Cricket, Grasshopper Cricket Grass Snake Frog, Shrew Shrew Cricket, Grasshopper Grasshopper Grass Eagle Snake, Shrew SAS21S101501 1 Identify the primary consumer(s) in the ecosystem. A. B. C. D. Snake Shrew Frog and Shrew Cricket and Grasshopper SAS21S101502 2 A snake eats a frog. What percentage of energy of the frog is transferred to the snake? A. B. C. D. 1% 2% 10% 90% Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 53 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 15 SAS21S101503 3 Which of these represents the correct food web of the ecosystem? B. A. D. C. SAS21S101504 4 Which organism has the largest biomass in the ecosystem? A. B. C. D. Grass Snake Eagle Grasshopper The picture shows the di erent trophic levels of an ecosystem. Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 54 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 15 SAS21S101505 5 Which level consists of herbivores? A. B. C. D. Level 1 Level 2 Level 3 Level 4 The pair of reactions show the formation of ozone (O ). O UV O + O O+O O SAS21S101506 6 What is the role of ultraviolet (UV) rays in the reaction? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S101507 7 The ozone layer of the atmosphere shields the Earth s surface from the ultraviolet radiations of the Sun. Which of these is likely to increase in humans with depletion of the ozone layer? A. B. C. D. AIDS COVID Jaundice Skin Cancer Alisha digs a pit in her garden and puts the following items in it. paper cups glass bowls fruit peels rubber slippers She then covers the pit with soil. SAS21S101508 8 Which item will decompose irst? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 55 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 15 Composting is the process where organic wastes are degraded into compost. The diagram shows the details of the process. SAS21S101509 9 What can be concluded from the diagram? A. B. C. D. Composting helps in recycling plastic scraps. Composting absorbs heat from the environment. Composting takes place only in the presence of oxygen. Composting takes place in the presence of either oxygen or carbon dioxide. SAS21S101510 10 Which of these will reduce if compost is used in place of inorganic fertilizer in farms? Circle Yes or No for the correct response. Will this reduce? Yes or No Moisture in the farm soil Yes/No Microorganisms in the farm soil Yes/No Chemical residue in the farm soil Yes/No Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 56 CENTRAL BOARD OF SECONDARY EDUCATION Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 16 Sustainable Management of Natural Resources Coliform bacteria are mainly present in human faeces. Drinking water should not contain more than 1 coliform per 100 mL. The graph shows the amount of coliforms found in four water samples collected for a study. SAS21S101601 1 What can be concluded from the graph? A. B. C. D. Sample 1 is safe for drinking. Sample 3 is least contaminated with human faeces. Sample 2 and sample 4 are collected from the same water source. Sample 1 and sample 2 contain the same concentration of coliforms. SAS21S101602 2 Bathing water should not contain more than 1000 coliforms per 100 mL. Which water sample is safe for bathing? A. B. C. D. Sample 1 Sample 2 Sample 3 Sample 4 Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 57 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 16 SAS21S101603 3 The same study was repeated over a period of ive years. Which questions can be answered by comparing the results of the study? Circle Yes or No for the correct response. Can this question be answered by the study? Yes or No Is the pollution in the water sources increasing over time? Yes/No Which water source is the most polluted? Yes/No What are the chemical wastes present in the water sources? Yes/No SAS21S101604 4 Industrial wastes entering rivers often make the river water acidic. How can this lead to a decrease in the population of many aquatic organisms? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ SAS21S101605 5 Which of these activities should be prohibited in water bodies to control water pollution? A. B. C. D. Fishing Swimming Rowing boats Washing Clothes The table lists the number of species of plants and animals in four forests over a time period. Year - 1980 Year - 2000 Plants Animals Plants Animals Forest 1 780 205 705 180 Forest 2 1255 410 1240 400 Forest 3 1740 685 1080 395 Forest 4 685 210 650 205 SAS21S101606 6 Which forest was the most biodiverse in the year 2000? A. B. C. D. Forest 1 Forest 2 Forest 3 Forest 4 Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 58 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 16 SAS21S101607 7 Which forest had the greatest loss of biodiversity between 1980 and 2000? A. B. C. D. Forest 1 Forest 2 Forest 3 Forest 4 SAS21S101608 8 Which of these areas has the greatest biodiversity? A. B. C. D. Desert Rainforest Grassland Mountain SAS21S101609 9 Which of these is a bad e ect of burning fossil fuels? A. B. C. D. Depletion of ozone layer Increase in global warming Increase in atmospheric nitrogen Decrease in atmospheric oxygen SAS21S101610 10 Which of these is an e ect of construction of dams? Circle Yes or No for the correct response. Is this an e ect of construction of dams? Yes or No Loss of biodiversity Yes/No Displacement of people Yes/No Increase in the frequency of loods Yes/No Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 59 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 1 Item Number Question 1 Question Code SAS21S100101 Grade & Unit Name Grade 10 | Chemical Reactions and Equations Concept | Sub-concept Physical Science | Physical and Chemical change Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that heating iron to red hot is a physical change as no new substance is formed. For example: It is a physical change as iron does not change its form. No Credit (No Score) Any other response or missing response Item Number Question 2 Question Code SAS21S100102 Grade & Unit Name Grade 10 | Chemical Reactions and Equations Concept | Sub-concept Physical Science | Balanced Chemical Equation Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. Three atoms of iron combine with water to form one molecule of iron oxide. No Credit (No Score) Any other response or missing response Item Number Question 3 Question Code SAS21S100103 Grade & Unit Name Grade 10 | Chemical Reactions and Equations Concept | Sub-concept Physical Science | Combination Reaction Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that glucose is oxidised. For example: Glucose is oxidised. No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 59 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 1 Item Number Question 4 Question Code SAS21S100104 Grade & Unit Name Grade 10 | Chemical Reactions and Equations Concept | Sub-concept Physical Science | Combination Reaction Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. Products No Credit (No Score) Any other response or missing response Item Number Question 5 Question Code SAS21S100105 Grade & Unit Name Grade 10 | Chemical Reactions and Equations Concept | Sub-concept Physical Science | Chemical Changes in Matter Competency Interpreting Data & Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. At 1 minute No Credit (No Score) Any other response or missing response Item Number Question 6 Question Code SAS21S100106 Grade & Unit Name Grade 10 | Chemical Reactions and Equations Concept | Sub-concept Physical Science | Chemical Changes in Matter Competency Interpreting Data & Evidence Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that the reaction rate will increase and therefore the volume of hydrogen formed at 2 minutes will be higher. No Credit (No Score) Any other response or missing response Item Number Question 7 Question Code SAS21S100107 Grade & Unit Name Grade 10 | Chemical Reactions and Equations Concept | Sub-concept Physical Science | Chemical Changes in Matter Competency Evaluating & Designing Scienti ic Enquiry Item Type Complex Multiple Choice Question Full Credit (Full Score) No Yes Yes No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 60 Curriculum Aligned Competency Based Test Items Item Number Question 8 Question Code SAS21S100108 Grade & Unit Name Grade 10 | Chemical Reactions and Equations Concept | Sub-concept Physical Science | Balanced Chemical Reaction Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mg + 2HCl MgCl + H No Credit (No Score) Any other response or missing response Item Number Question 9 Question Code SAS21S100109 Grade & Unit Name Grade 10 | Chemical Reactions and Equations Concept | Sub-concept Physical Science | Decomposition Reaction Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. Rotting of fruits and vegetables No Credit (No Score) Any other response or missing response Item Number Question 10 Question Code SAS21S100110 Grade & Unit Name Grade 10 | Chemical Reactions and Equations Concept | Sub-concept Physical Science | Writing a Chemical Equation Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. CH + 2O CO + 2H O No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Science Class 10 Chapter 1 Page 61 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 2 Item Number Question 1 Question Code SAS21S100201 Grade & Unit Name Grade 10 | Acids, Bases and Salts Concept | Sub-concept Physical Science | How strong are acid and base solutions? Competency Interpreting Data & Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Liquid 2 No Credit (No Score) Any other response or missing response Item Number Question 2 Question Code SAS21S100202 Grade & Unit Name Grade 10 | Acids, Bases and Salts Concept | Sub-concept Physical Science | Properties of Acids and Bases Competency Evaluating & Designing Scienti ic Enquiry Item Type Complex Multiple Choice Question Full Credit (Full Score) No Yes Yes No Credit (No Score) Any other response or missing response Item Number Question 3 Question Code SAS21S100203 Grade & Unit Name Grade 10 | Acids, Bases and Salts Concept | Sub-concept Physical Science | Indicators of pH value Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that the colour will be colour 7 because distilled water is neither acidic nor basic. For example: Colour 7. Distilled water is neither acidic nor basic. No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 62 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 2 Item Number Question 4 Question Code SAS21S100204 Grade & Unit Name Grade 10 | Acids, Bases and Salts Concept | Sub-concept Physical Science | Chemical properties of Acids and Bases Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions salt as the response No Credit (No Score) Any other response or missing response Item Number Question 5 Question Code SAS21S100205 Grade & Unit Name Grade 10 | Acids, Bases and Salts Concept | Sub-concept Physical Science | Properties of POP Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. It gets hard when mixed with water. No Credit (No Score) Any other response or missing response Item Number Question 6 Question Code SAS21S100206 Grade & Unit Name Grade 10 | Acids, Bases and Salts Concept | Sub-concept Physical Science | Properties of Crystals of Salts Competency Interpreting Data & Evidence Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) Yes Yes No No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 63 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 2 Item Number Question 7 Question Code SAS21S100207 Grade & Unit Name Grade 10 | Acids, Bases and Salts Concept | Sub-concept Physical Science | Properties of Crystals of Salts Competency Evaluating & Designing Scienti ic Enquiry Item Type Constructed Response Full Credit (Full Score) Mentions that the green salt powder will turn whitish AND that there will be no droplets formed. Partial Credit (Partial Score) Mentions any one of the two responses of full credit. For example: The green salt powder will turn whitish. OR There will be no droplets formed. No Credit (No Score) Any other response or missing response Item Number Question 8 Question Code SAS21S100208 Grade & Unit Name Grade 10 | Acids, Bases and Salts Concept | Sub-concept Physical Science | Properties of Acids and Bases Competency Evaluating & Designing Scienti ic Enquiry Item Type Constructed Response Full Credit (Full Score) Mentions that Mike was trying to ind out whether acids and bases are good conductors of electricity. For example: Are acids and bases good conductors of electricity? No Credit (No Score) Any other response or missing response Item Number Question 9 Question Code SAS21S100209 Grade & Unit Name Grade 10 | Acids, Bases and Salts Concept | Sub-concept Physical Science | Properties of Acids and Bases Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that the lamp will not glow if the circuit is placed in distilled water as distilled water does not contain free H or free OH - ions. No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 64 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 2 Item Number Question 10 Question Code SAS21S100210 Grade & Unit Name Grade 10 | Acids, Bases and Salts Concept | Sub-concept Physical Science | Chemical Properties of Acids and Bases Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions hydrogen as the response No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 65 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 3 Item Number Question 1 Question Code SAS21S100301 Grade & Unit Name Grade 10 | Metals and Non-metals Concept | Sub-concept Physical Science | Physical Properties of Metals and Non-metals Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. Nail 1 No Credit (No Score) Any other response or missing response Item Number Question 2 Question Code SAS21S100302 Grade & Unit Name Grade 10 | Metals and Non-metals Concept | Sub-concept Physical Science | Physical Properties of Metals and Non-metals Competency Evaluating and Designing Scienti ic Enquiry Item Type Multiple Choice Question Full Credit (Full Score) C. Thickness of wax coatings No Credit (No Score) Any other response or missing response Item Number Question 3 Question Code SAS21S100303 Grade & Unit Name Grade 10 | Metals and Non-metals Concept | Sub-concept Physical Science | Chemical Properties of Metals Competency Interpreting Data and Evidence Scienti ically Item Type Constructed Response Full Credit (Full Score) C. ZnSO No Credit (No Score) Any other response or missing response Item Number Question 4 Question Code SAS21S100304 Grade & Unit Name Grade 10 | Metals and Non-metals Concept | Sub-concept Physical Science | Chemical Properties of Metals Competency Evaluating and Designing Scienti ic Enquiry Item Type Multiple Choice Question Full Credit (Full Score) B. Use pieces of small zinc lakes No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 66 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 3 Item Number Question 5 Question Code SAS21S100305 Grade & Unit Name Grade 10 | Metals and Non-metals Concept | Sub-concept Physical Science | Chemical Properties of Metals Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that no reaction takes place as copper is less reactive than zinc. For example: Copper is less reactive than zinc. No Credit (No Score) Any other response or missing response Item Number Question 6 Question Code SAS21S100306 Grade & Unit Name Grade 10 | Metals and Non-metals Concept | Sub-concept Physical Science | Occurrence of Metals Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that gold has very low reactivity. No Credit (No Score) Any other response or missing response Item Number Question 7 Question Code SAS21S100307 Grade & Unit Name Grade 10 | Metals and Non-metals Concept | Sub-concept Physical Science | Chemical Properties of Metals Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. H No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 67 Curriculum Aligned Competency Based Test Items Item Number Question 8 Question Code SAS21S100308 Grade & Unit Name Grade 10 | Metals and Non-metals Concept | Sub-concept Physical Science | Properties of Ionic Compounds Competency Explaining Phenomena Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) No Yes Yes No Credit (No Score) Any other response or missing response Item Number Question 9 Question Code SAS21S100309 Grade & Unit Name Grade 10 | Metals and Non-metals Concept | Sub-concept Physical Science | Extraction of Metals Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. Aluminium No Credit (No Score) Any other response or missing response Item Number Question 10 Question Code SAS21S100310 Grade & Unit Name Grade 10 | Metals and Non-metals Concept | Sub-concept Physical Science | Reaction of Metals with Non-metals Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. One No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Science Class 10 Chapter 3 Page 68 Curriculum Aligned Competency Based Test Items Item Number Question 1 Question Code SAS21S100401 Grade & Unit Name Grade 10 | Carbon and its Compounds Concept | Sub-concept Physical Science | Bonding in Carbon Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Carbon No Credit (No Score) Any other response or missing response Item Number Question 2 Question Code SAS21S100402 Grade & Unit Name Grade 10 | Carbon and its Compounds Concept | Sub-concept Physical Science | Bonding in Carbon Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions covalent bond as the response. No Credit (No Score) Any other response or missing response Item Number Question 3 Question Code SAS21S100403 Grade & Unit Name Grade 10 | Carbon and its Compounds Concept | Sub-concept Physical Science | Bonding in Carbon Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. No Credit (No Score) Any other response or missing response Item Number Question 4 Question Code SAS21S100404 Grade & Unit Name Grade 10 | Carbon and its Compounds Concept | Sub-concept Physical Science | Properties of Carbon Compounds Competency Explaining Phenomena Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) No Yes Yes No Credit (No Score) Any other response or missing response Science Class 10 Chapter 4 N N Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 69 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 4 Item Number Question 5 Question Code SAS21S100405 Grade & Unit Name Grade 10 | Carbon and its Compounds Concept | Sub-concept Physical Science | Saturated and Unsaturated Carbon Compounds Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. One No Credit (No Score) Any other response or missing response Item Number Question 6 Question Code SAS21S100406 Grade & Unit Name Grade 10 | Carbon and its Compounds Concept | Sub-concept Physical Science | Saturated and Unsaturated Carbon Compounds Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. C H No Credit (No Score) Any other response or missing response Item Number Question 7 Question Code SAS21S100407 Grade & Unit Name Grade 10 | Carbon and its Compounds Concept | Sub-concept Physical Science | Homologous Series Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. C H No Credit (No Score) Any other response or missing response Item Number Question 8 Question Code SAS21S100408 Grade & Unit Name Grade 10 | Carbon and its Compounds Concept | Sub-concept Physical Science | Chemical Properties of Carbon Compounds Competency Interpreting Data and Evidence Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) No Yes Yes No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 70 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 4 Item Number Question 9 Question Code SAS21S100409 Grade & Unit Name Grade 10 | Carbon and its Compounds Concept | Sub-concept Physical Science | Chemical Properties of Carbon Compounds Competency Explaining phenomena scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. Reaction iii No Credit (No Score) Any other response or missing response Item Number Question 10 Question Code SAS21S100410 Grade & Unit Name Grade 10 | Carbon and its Compounds Concept | Sub-concept Physical Science | Allotropes of Carbon Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that allotrope 2 is harder as each of its atoms has a greater number of bonds than that of allotrope 1. For example, Allotrope 2. Its atoms have a greater number of bonds than that of allotrope 1. No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 71 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 5 Item Number Question 1 Question Code SAS21S100501 Grade & Unit Name Grade 10 | Periodic Classi ication of Elements Concept | Sub-concept Physical Sciences | Periodic Table Competency Explaining phenomena scienti ically Item Type Multiple Choice Questions Full Credit (Full Score) C. Dmitri Ivanovich Mendele ev No Credit (No Score) Any other response or missing response Item Number Question 2 Question Code SAS21S100502 Grade & Unit Name Grade 10 | Periodic Classi ication of Elements Concept | Sub-concept Physical Sciences | Newland s Law of Octaves Competency Explaining phenomena scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that Law of Octaves does not hold true for heavier elements. No Credit (No Score) Any other response or missing response Item Number Question 3 Question Code SAS21S100503 Grade & Unit Name Grade 10 | Periodic Classi ication of Elements Concept | Sub-concept Physical Sciences | Position of Element in the Modern Periodic Table Competency Explaining phenomena scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions X as Groups and Y as Periods. No Credit (No Score) Any other response or missing response Item Number Question 4 Question Code SAS21S100504 Grade & Unit Name Grade 10 | Periodic Classi ication of Elements Concept | Sub-concept Physical Sciences | Position of Element in the Modern Periodic Table Competency Interpreting data and evidence scienti ically Item Type Multiple Choice Questions Full Credit (Full Score) C. Dmitri Ivanovich Mendele ev No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 72 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 5 Item Number Question 5 Question Code SAS21S100505 Grade & Unit Name Grade 10 | Periodic Classi ication of Elements Concept | Sub-concept Physical Sciences | Position of Element in the Modern Periodic Table Competency Explaining phenomena scienti ically Item Type Multiple Choice Questions Full Credit (Full Score) C. Increase in atomic number No Credit (No Score) Any other response or missing response Item Number Question 6 Question Code SAS21S100506 Grade & Unit Name Grade 10 | Periodic Classi ication of Elements Concept | Sub-concept Physical Sciences | Position of Element in the Modern Periodic Table Competency Interpreting data and evidence scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) Mentions all three responses correctly. Yes No Yes No Credit (No Score) Any other response or missing response Item Number Question 7 Question Code SAS21S100507 Grade & Unit Name Grade 10 | Periodic Classi ication of Elements Concept | Sub-concept Physical Sciences | Trends in the Modern Periodic Table Competency Interpreting data and evidence scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Increase in atomic radius/Increase in electronegativity No Credit (No Score) Any other response or missing response Item Number Question 8 Question Code SAS21S100508 Grade & Unit Name Grade 10 | Periodic Classi ication of Elements Concept | Sub-concept Physical Sciences | Trends in the Modern Periodic Table Competency Interpreting data and evidence scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. K No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 73 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 5 Item Number Question 9 Question Code SAS21S100509 Grade & Unit Name Grade 10 | Periodic Classi ication of Elements Concept | Sub-concept Physical Sciences | Trends in the Modern Periodic Table Competency Explaining phenomena scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. As No Credit (No Score) Any other response or missing response Item Number Question 10 Question Code SAS21S100510 Grade & Unit Name Grade 10 | Periodic Classi ication of Elements Concept | Sub-concept Physical Sciences | Trends in the Modern Periodic Table Competency Explaining phenomena scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. So No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 74 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 6 Item Number Question 1 Question Code SAS21S100601 Grade & Unit Name Grade 10 | Life Processes Concept | Sub-concept Life Science | Excretion in Human Beings Competency Explaining Phenomena Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) No Yes Yes No Credit (No Score) Any other response or missing response Item Number Question 2 Question Code SAS21S100602 Grade & Unit Name Grade 10 | Life Processes Concept | Sub-concept Life Science | Excretion in Human Beings Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that the blood with wastes is coming from a vein. For example: Blood with waste is coming from a vein. No Credit (No Score) Any other response or missing response Item Number Question 3 Question Code SAS21S100603 Grade & Unit Name Grade 10 | Life Processes Concept | Sub-concept Life Science | Excretion in Human Beings Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. Kidneys No Credit (No Score) Any other response or missing response Item Number Question 4 Question Code SAS21S100604 Grade & Unit Name Grade 10 | Life Processes Concept | Sub-concept Life Science | Transport of Water in Plants Competency Evaluating & Designing Scienti ic Enquiry Item Type Multiple Choice Question Full Credit (Full Score) B. Image No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 75 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 6 Item Number Question 5 Question Code SAS21S100605 Grade & Unit Name Grade 10 | Life Processes Concept | Sub-concept Life Science | Transport of Water in Plants Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that loss of water by plant leaves helps the plant in absorbing water and minerals from the soil and also in controlling the temperature. For example: It helps the plant to absorb water and minerals from the soil. It helps the plant to control its temperature. No Credit (No Score) Any other response or missing response Item Number Question 6 Question Code SAS21S100606 Grade & Unit Name Grade 10 | Life Processes Concept | Sub-concept Life Science | Transportation in Human Beings Competency Interpreting Data & Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Capillaries are permeable to gases. No Credit (No Score) Any other response or missing response Item Number Question 7 Question Code SAS21S100607 Grade & Unit Name Grade 10 | Life Processes Concept | Sub-concept Life Science | Transportation in Human Beings Competency Interpreting Data & Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Pulmonary veins will receive blood with less oxygen. No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 76 Curriculum Aligned Competency Based Test Items Item Number Question 8 Question Code SAS21S100608 Grade & Unit Name Grade 10 | Life Processes Concept | Sub-concept Life Science | Nutrition in Human Beings Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. 1 No Credit (No Score) Any other response or missing response Item Number Question 9 Question Code SAS21S100609 Grade & Unit Name Grade 10 | Life Processes Concept | Sub-concept Life Science | Nutrition in Human Beings Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. Digestion of fats No Credit (No Score) Any other response or missing response Item Number Question 10 Question Code SAS21S100610 Grade & Unit Name Grade 10 | Life Processes Concept | Sub-concept Life Science | Respiration Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. Smoking destroys the hair-like structures. No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Science Class 10 Chapter 6 Page 77 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 7 Item Number Question 1 Question Code SAS21S100701 Grade & Unit Name Grade 10 | Control and Coordination Concept | Sub-concept Life Science | Movement Due to Growth Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Image No Credit (No Score) Any other response or missing response Item Number Question 2 Question Code SAS21S100702 Grade & Unit Name Grade 10 | Control and Coordination Concept | Sub-concept Life Science | Movement Due to Growth Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Against gravity No Credit (No Score) Any other response or missing response Item Number Question 3 Question Code SAS21S100703 Grade & Unit Name Grade 10 | Control and Coordination Concept | Sub-concept Life Science | Plant Hormones Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. Cytokinins No Credit (No Score) Any other response or missing response Item Number Question 4 Question Code SAS21S100704 Grade & Unit Name Grade 10 | Control and Coordination Concept | Sub-concept Life Science | Re lex Action Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Receptor Sensory Neurone Relay Neurone Motor Neurone E ector No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 78 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 7 Item Number Question 5 Question Code SAS21S100705 Grade & Unit Name Grade 10 | Control and Coordination Concept | Sub-concept Life Science | Re lex Action Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Spinal cord No Credit (No Score) Any other response or missing response Item Number Question 6 Question Code SAS21S100706 Grade & Unit Name Grade 10 | Control and Coordination Concept | Sub-concept Life Science | Hormones in Humans Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. The average height of girls during puberty is greater than that of boys. No Credit (No Score) Any other response or missing response Item Number Question 7 Question Code SAS21S100707 Grade & Unit Name Grade 10 | Control and Coordination Concept | Sub-concept Life Science | Hormones in Humans Competency Interpreting Data and Evidence Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that the title is incorrect because there is no data for height of girls and boys at birth For example: The title is incorrect because the heights of boys and girls are shown from age 4 onwards. OR The title is incorrect because the height of boys and girls from 0 to 3 years is not given. No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 79 Curriculum Aligned Competency Based Test Items Item Number Question 8 Question Code SAS21S100708 Grade & Unit Name Grade 10 | Control and Coordination Concept | Sub-concept Life Science | Hormones in Humans Competency Explaining Phenomena Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) Yes No Yes No Credit (No Score) Any other response or missing response Item Number Question 9 Question Code SAS21S100709 Grade & Unit Name Grade 10 | Control and Coordination Concept | Sub-concept Life Science | Human Brain Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. Jumping from a height No Credit (No Score) Any other response or missing response Item Number Question 10 Question Code SAS21S100710 Grade & Unit Name Grade 10 | Control and Coordination Concept | Sub-concept Life Science | Hormones in Humans Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. Diabetes No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Science Class 10 Chapter 7 Page 80 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 8 Item Number Question 1 Question Code SAS21S100801 Grade & Unit Name Grade 10 | How do Organisms Reproduce? Concept | Sub-concept Life Science | Aquatic Life with pH of Water Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Population 2 No Credit (No Score) Any other response or missing response Item Number Question 2 Question Code SAS21S100802 Grade & Unit Name Grade 10 | How do Organisms Reproduce? Concept | Sub-concept Life Science | Aquatic Life with pH of Water Competency Explaining Phenomena Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) No Yes No No Credit (No Score) Any other response or missing response Item Number Question 3 Question Code SAS21S100803 Grade & Unit Name Grade 10 | How do Organisms Reproduce? Concept | Sub-concept Life Science | Aquatic Life with pH of Water Competency Interpreting Data and Evidence Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that the ish in both tanks will not survive as the conditions are unfavourable for all ish For example: The ish in both tanks will not survive. The conditions are unfavourable for all ish. No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 81 Curriculum Aligned Competency Based Test Items Item Number Question 4 Question Code SAS21S100804 Grade & Unit Name Grade 10 | How do Organisms Reproduce? Concept | Sub-concept Life Science | Vegetative Propagation Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. Some plants can regenerate. No Credit (No Score) Any other response or missing response Item Number Question 5 Question Code SAS21S100805 Grade & Unit Name Grade 10 | How do Organisms Reproduce? Concept | Sub-concept Life Science | Vegetative Propagation Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions the term tissue culture No Credit (No Score) Any other response or missing response Item Number Question 6 Question Code SAS21S100806 Grade & Unit Name Grade 10 | How do Organisms Reproduce? Concept | Sub-concept Life Science | Reproductive Health Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions puberty/adolescence as the correct response No Credit (No Score) Any other response or missing response Item Number Question 7 Question Code SAS21S100807 Grade & Unit Name Grade 10 | How do Organisms Reproduce? Concept | Sub-concept Life Science | Reproductive Health Competency Explaining Phenomena Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) Yes Yes No No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Science Class 10 Chapter 8 Page 82 Curriculum Aligned Competency Based Test Items Item Number Question 8 Question Code SAS21S100808 Grade & Unit Name Grade 10 | How do Organisms Reproduce? Concept | Sub-concept Life Science | Reproduction In Human Beings Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. 1 No Credit (No Score) Any other response or missing response Item Number Question 9 Question Code SAS21S100809 Grade & Unit Name Grade 10 | How do Organisms Reproduce? Concept | Sub-concept Life Science | Reproduction In Human Beings Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions 1 as the correct answer No Credit (No Score) Any other response or missing response Item Number Question 10 Question Code SAS21S100810 Grade & Unit Name Grade 10 | How do Organisms Reproduce? Concept | Sub-concept Life Science | Reproductive Health Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. Gonorrhoea No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Science Class 10 Chapter 8 Page 83 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 9 Item Number Question 1 Question Code SAS21S100901 Grade & Unit Name Grade 10 | Heredity and Evolution Concept | Sub-concept Life Science | Rules of Inheritance Of Traits Competency Interpreting Data & Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. 50% No Credit (No Score) Any other response or missing response Item Number Question 2 Question Code SAS21S100902 Grade & Unit Name Grade 10 | Heredity and Evolution Concept | Sub-concept Life Science | Rules of Inheritance Of Traits Competency Interpreting Data & Evidence Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that all lowers in the next generation would be red as R is the dominant trait, the lowers will inherit Rw set of genes For example: All lowers would be red as R is dominant All lowers would be red as they would have Rw set in the irst generation. No Credit (No Score) Any other response or missing response Item Number Question 3 Question Code SAS21S100903 Grade & Unit Name Grade 10 | Heredity and Evolution Concept | Sub-concept Life Science | Rules of Inheritance Of Traits Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. Mutation No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 84 Curriculum Aligned Competency Based Test Items Item Number Question 4 Question Code SAS21S100904 Grade & Unit Name Grade 10 | Heredity and Evolution Concept | Sub-concept Life Science | Fossils Competency Interpreting Data & Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. Layer 6 No Credit (No Score) Any other response or missing response Item Number Question 5 Question Code SAS21S100905 Grade & Unit Name Grade 10 | Heredity and Evolution Concept | Sub-concept Life Science | Fossils Competency Interpreting Data & Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Layer 3 and Layer 9 No Credit (No Score) Any other response or missing response Item Number Question 6 Question Code SAS21S100906 Grade & Unit Name Grade 10 | Heredity and Evolution Concept | Sub-concept Life Science | Determination of Sex Competency Interpreting Data & Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Mother xx/Father XY No Credit (No Score) Any other response or missing response Item Number Question 7 Question Code SAS21S100907 Grade & Unit Name Grade 10 | Heredity and Evolution Concept | Sub-concept Life Science | Acquired and Inherited Traits Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. Short hair No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Science Class 10 Chapter 9 Page 85 Curriculum Aligned Competency Based Test Items Item Number Question 8 Question Code SAS21S100908 Grade & Unit Name Grade 10 | Heredity and Evolution Concept | Sub-concept Life Science | Speciation Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. They cannot interbreed. No Credit (No Score) Any other response or missing response Item Number Question 9 Question Code SAS21S100909 Grade & Unit Name Grade 10 | Heredity and Evolution Concept | Sub-concept Life Science | Speciation Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. Changes in DNA No Credit (No Score) Any other response or missing response Item Number Question 10 Question Code SAS21S100910 Grade & Unit Name Grade 10 | Heredity and Evolution Concept | Sub-concept Life Science | Evolution Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) Mentions all three responses correctly Yes No No No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Science Class 10 Chapter 9 Page 86 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 10 Item Number Question 1 Question Code SAS21S101001 Grade & Unit Name Grade 10 | Light: Re lection and Refraction Concept | Sub-concept Physical Science | Image Formation by Spherical Mirrors Competency Interpreting Data & Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. Distance between pole and centre of curvature is twice the focal length. No Credit (No Score) Any other response or missing response Item Number Question 2 Question Code SAS21S101002 Grade & Unit Name Grade 10 | Light: Re lection and Refraction Concept | Sub-concept Physical Science | Image Formation by Spherical Mirrors Competency Interpreting Data & Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. Diagram 3 No Credit (No Score) Any other response or missing response Item Number Question 3 Question Code SAS21S101003 Grade & Unit Name Grade 10 | Light: Re lection and Refraction Concept | Sub-concept Physical Science | Image Formation by Spherical Mirrors Competency Interpreting Data & Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. When object is located within the focal length No Credit (No Score) Any other response or missing response Item Number Question 4 Question Code SAS21S101004 Grade & Unit Name Grade 10 | Light: Re lection and Refraction Concept | Sub-concept Physical Science | Image Formation by Spherical Mirrors Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) No Yes No No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 87 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 10 Item Number Question 5 Question Code SAS21S101005 Grade & Unit Name Grade 10 | Light: Re lection and Refraction Concept | Sub-concept Physical Science | Image Formation by Spherical Mirrors Competency Interpreting Data & Evidence Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) Yes Yes Yes No Credit (No Score) Any other response or missing response Item Number Question 6 Question Code SAS21S101006 Grade & Unit Name Grade 10 | Light: Re lection and Refraction Concept | Sub-concept Physical Science | Image Formation by Spherical Mirrors Competency Interpreting Data & Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. Rear-view mirror of a car No Credit (No Score) Any other response or missing response Item Number Question 7 Question Code SAS21S101007 Grade & Unit Name Grade 10 | Light: Re lection and Refraction Concept | Sub-concept Physical Science | Image Formation by Spherical Mirrors Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. The image is real and larger than the object. No Credit (No Score) Any other response or missing response Item Number Question 8 Question Code SAS21S101008 Grade & Unit Name Grade 10 | Light: Re lection and Refraction Concept | Sub-concept Physical Science | The Refractive Index Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that X represents air. Air No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 88 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 10 Item Number Question 9 Question Code SAS21S101009 Grade & Unit Name Grade 10 | Light: Re lection and Refraction Concept | Sub-concept Physical Science | Refraction Through a Rectangular Glass Slab Competency Explaining Phenomena Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) C. Flint glass/water No Credit (No Score) Any other response or missing response Item Number Question 10 Question Code SAS21S101010 Grade & Unit Name Grade 10 | Light: Re lection and Refraction Concept | Sub-concept Physical Science | Power of a Lens Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that a lens with a negative focal length has a negative power by the mentioned formula. Concave lenses have a negative power. No Credit (No Score) The lens is concave. A lens with a negative focal length has a negative power. Concave lenses have negative power. Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 89 Curriculum Aligned Competency Based Test Items Item Number Question 1 Question Code SAS21S101101 Grade & Unit Name Grade 10 | The Human Eye and The Colourful World Concept | Sub-concept Life Science | The Human Eye Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions X is iris No Credit (No Score) Any other response or missing response Item Number Question 2 Question Code SAS21S101102 Grade & Unit Name Grade 10 | The Human Eye and The Colourful World Concept | Sub-concept Life Science | The Human Eye Competency Interpreting Data & Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. Cornea No Credit (No Score) Any other response or missing response Item Number Question 3 Question Code SAS21S101103 Grade & Unit Name Grade 10 | The Human Eye and the Colourful World Concept | Sub-concept Life Science | The Human Eye Competency Interpreting Data & Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Real and inverted No Credit (No Score) Any other response or missing response Item Number Question 4 Question Code SAS21S101104 Grade & Unit Name Grade 10 | The Human Eye and The Colourful World Concept | Sub-concept Life Science | The Human Eye Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. Distance of the candle from the eyes No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Science Class 10 Chapter 11 Page 90 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 11 Item Number Question 5 Question Code SAS21S101105 Grade & Unit Name Grade 10 | The Human Eye and The Colourful World Concept | Sub-concept Life Science | The Human Eye Competency Interpreting Data and Evidence Scienti ically Item Type Constructed Response Full Credit (Full Score) B. Image No Credit (No Score) Any other response or missing response Item Number Question 6 Question Code SAS21S101106 Grade & Unit Name Grade 10 | The Human Eye and The Colourful World Concept | Sub-concept Life Science | The Human Eye Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions iris as the response No Credit (No Score) Any other response or missing response Item Number Question 7 Question Code SAS21S101107 Grade & Unit Name Grade 10 | The Human Eye and the Colourful World Concept | Sub-concept Life Science | Defect of Vision Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that ageing is the primary reason. For example, Old age No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 91 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 11 Item Number Question 8 Question Code SAS21S101108 Grade & Unit Name Grade 10 | The Human Eye and the Colourful World Concept | Sub-concept Life Science | The Human Eye Competency Complex Multiple Choice Question Item Type No Yes No Full Credit (Full Score) D. Distance of the candle from the eyes No Credit (No Score) Any other response or missing response Item Number Question 9 Question Code SAS21S101109 Grade & Unit Name Grade 10 | The Human Eye and the Colourful World Concept | Sub-concept Life Science | Dispersion of white light by a glass prism Competency Interpreting Data & Evidence Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) Yes No Yes No Credit (No Score) Any other response or missing response Item Number Question 10 Question Code SAS21S101110 Grade & Unit Name Grade 10 | The Human Eye and The Colourful World Concept | Sub-concept Life Science | Scattering of Light Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that the leaves absorb all colours and re lect only the green colour to the eyes No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 92 Curriculum Aligned Competency Based Test Items Item Number Question 1 Question Code SAS21S101201 Grade & Unit Name Grade 10 | Electricity Concept | Sub-concept Physical Science | Electrical Resistivity Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. Material 1 No Credit (No Score) Any other response or missing response Item Number Question 2 Question Code SAS21S101202 Grade & Unit Name Grade 10 | Electricity Concept | Sub-concept Physical Science | Electrical Resistivity Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions ohm-meter ( m) as correct response. No Credit (No Score) Any other response or missing response Item Number Question 3 Question Code SAS21S101203 Grade & Unit Name Grade 10 | Electricity Concept | Sub-concept Physical Science | Electrical Resistivity Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. It has high resistivity and high melting point. No Credit (No Score) Any other response or missing response Item Number Question 4 Question Code SAS21S101204 Grade & Unit Name Grade 10 | Electricity Concept | Sub-concept Physical Science | Electric Current and Circuit Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. Distance of the candle from the eyes No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Science Class 10 Chapter 12 Page 93 Curriculum Aligned Competency Based Test Items Item Number Question 5 Question Code SAS21S101205 Grade & Unit Name Grade 10 | Electricity Concept | Sub-concept Physical Science | Electric Current and Circuit Competency Interpreting Data and Evidence Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions the response as given below, We are given, Amount of electric current, I = 1A; Partial Credit (Partial Score) Time of electric current low, t = 5 min= 300 s Science Class 10 Chapter 12 The total amount of electric charge that low within the time, Q = I t = 1A 300 s = 300 C No Credit (No Score) Any other response or missing response Item Number Question 6 Question Code SAS21S101206 Grade & Unit Name Grade 10 | Electricity Concept | Sub-concept Physical Science | Factors on which resistance depends Competency Explaining Phenomena Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) Mentions all three responses correctly. Yes/Yes/No No Credit (No Score) Any other response or missing response Item Number Question 7 Question Code SAS21S101207 Grade & Unit Name Grade 10 | Electricity Concept | Sub-concept Physical Science | Circuit diagram Competency Interpreting Data and Evidence Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) No Yes No No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 94 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 12 Item Number Question 8 Question Code SAS21S101208 Grade & Unit Name Grade 10 | Electricity Concept | Sub-concept Physical Science | Factors on Which Resistance Depends Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that the ammeter s reading will be decreased by one-half. No Credit (No Score) Any other response or missing response Item Number Question 9 Question Code SAS21S101209 Grade & Unit Name Grade 10 | Electricity Concept | Sub-concept Physical Science | Resistance of a System of Resistors Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. 9 No Credit (No Score) Any other response or missing response Item Number Question 10 Question Code SAS21S101210 Grade & Unit Name Grade 10 | Electricity Concept | Sub-concept Physical Science | Resistance of a System of Resistors Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. less than 1 No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 95 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 13 Item Number Question 1 Question Code SAS21S101301 Grade & Unit Name Grade 10 | Magnetic E ects of Electric Current Concept | Sub-concept Physical Science | Magnetic Field and Field Lines Competency Interpreting Data and Evidence Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that the ammeter s reading will be decreased by one-half. No Credit (No Score) Any other response or missing response Item Number Question 2 Question Code SAS21S101302 Grade & Unit Name Grade 10 | Magnetic E ects of Electric Current Concept | Sub-concept Physical Science | Magnetic Field and Field Lines Competency Explaining Phenomena Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) No Yes No No Credit (No Score) Any other response or missing response Item Number Question 3 Question Code SAS21S101303 Grade & Unit Name Grade 10 | Magnetic E ects of Electric Current Concept | Sub-concept Physical Science | Magnetic Field Due To Current Carrying Conductor Competency Evaluating and Designing Scienti ic Enquiry Item Type Multiple Choice Question Full Credit (Full Score) B. The de lection of the needle will increase. No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 96 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 13 Item Number Question 4 Question Code SAS21S101304 Grade & Unit Name Grade 10 | Magnetic E ects of Electric Current Concept | Sub-concept Physical Science | Magnetic Field Due To Current Carrying Conductor Competency Evaluating and Designing Scienti ic Enquiry Item Type Constructed Response Full Credit (Full Score) No Credit (No Score) Any other response or missing response Item Number Question 5 Question Code SAS21S101305 Grade & Unit Name Grade 10 | Magnetic E ects of Electric Current Concept | Sub-concept Physical Science | Electromagnetic Induction Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. Electromagnet 3 No Credit (No Score) Any other response or missing response Item Number Question 6 Question Code SAS21S101306 Grade & Unit Name Grade 10 | Magnetic E ects of Electric Current Concept | Sub-concept Physical Science | Electromagnetic Induction Competency Evaluating and Designing Scienti ic Enquiry Item Type Complex Multiple Choice Question Full Credit (Full Score) Yes Yes No No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 97 Curriculum Aligned Competency Based Test Items Item Number Question 7 Question Code SAS21S101307 Grade & Unit Name Grade 10 | Magnetic E ects of Electric Current Concept | Sub-concept Physical Science | Electromagnetic Induction Competency Explaining Phenomena Scienti ically Item Type Constructed Response Science Class 10 Chapter 13 Full Credit (Full Score) No Credit (No Score) Any other response or missing response Item Number Question 8 Question Code SAS21S101308 Grade & Unit Name Grade 10 | Magnetic E ects of Electric Current Concept | Sub-concept Physical Science | Electromagnetic Induction Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Electric bell No Credit (No Score) Any other response or missing response Item Number Question 9 Question Code SAS21S101309 Grade & Unit Name Grade 10 | Magnetic E ects of Electric Current Concept | Sub-concept Physical Science | Domestic Electric Circuits Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions black wire as the response. No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 98 Curriculum Aligned Competency Based Test Items Item Number Question 10 Question Code SAS21S101310 Grade & Unit Name Grade 10 | Magnetic E ects of Electric Current Concept | Sub-concept Physical Science | Domestic Electric Circuits Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. 15 Ampere No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Science Class 10 Chapter 13 Page 99 Curriculum Aligned Competency Based Test Items Item Number Question 1 Question Code SAS21S101401 Grade & Unit Name Grade 10 | Sources of Energy Concept | Sub-concept Earth Science | Good Source Of Energy Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. LPG No Credit (No Score) Any other response or missing response Item Number Question 2 Question Code SAS21S101401 Grade & Unit Name Grade 10 | Sources of Energy Concept | Sub-concept Earth Science | Solar Energy Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. At noon under a clear sky No Credit (No Score) Any other response or missing response Item Number Question 3 Question Code SAS21S101403 Grade & Unit Name Grade 10 | Sources of Energy Concept | Sub-concept Earth Science | Nuclear Energy Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions He as correct response No Credit (No Score) Any other response or missing response Item Number Question 4 Question Code SAS21S101404 Grade & Unit Name Grade 10 | Sources of Energy Concept | Sub-concept Earth Science | Energy from Sea Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. Tidal energy No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Science Class 10 Chapter 14 Page 100 Curriculum Aligned Competency Based Test Items Item Number Question 4 Question Code SAS21S101404 Grade & Unit Name Grade 10 | Sources of Energy Concept | Sub-concept Earth Science | Fossils Fuels Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Coal No Credit (No Score) Any other response or missing response Item Number Question 6 Question Code SAS21S101406 Grade & Unit Name Grade 10 | Sources of Energy Concept | Sub-concept Earth Science | Biomass Competency Interpreting Data and Evidence Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) No Yes Yes No Credit (No Score) Any other response or missing response Item Number Question 7 Question Code SAS21S101407 Grade & Unit Name Grade 10 | Sources of Energy Concept | Sub-concept Earth Science | Fossil Fuels Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. More than 300 million years No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Science Class 10 Chapter 14 Page 101 Curriculum Aligned Competency Based Test Items Item Number Question 8 Question Code SAS21S101408 Grade & Unit Name Grade 10 | Sources of Energy Concept | Sub-concept Earth Science | Fossil Fuels Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions any three examples of fossil fuels. Science Class 10 Chapter 14 For example: Coal, petrol, diesel, LPG No Credit (No Score) Any other response or missing response Item Number Question 9 Question Code SAS21S101409 Grade & Unit Name Grade 10 | Sources of Energy Concept | Sub-concept Earth Science | Biomass Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. As manure for plants No Credit (No Score) Any other response or missing response Item Number Question 10 Question Code SAS21S101410 Grade & Unit Name Grade 10 | Sources of Energy Concept | Sub-concept Earth Science | Fossil Fuels Competency Interpreting Data and Evidence Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) Yes No No No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 102 Curriculum Aligned Competency Based Test Items Item Number Question 1 Question Code SAS21S101501 Grade & Unit Name Grade 10 | Our Environment Concept | Sub-concept Earth Science | Food Chains and Webs Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. Cricket and Grasshopper No Credit (No Score) Any other response or missing response Item Number Question 2 Question Code SAS21S101502 Grade & Unit Name Grade 10 | Our Environment Concept | Sub-concept Earth Science | Food Chains and Webs Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. 10% No Credit (No Score) Any other response or missing response Item Number Question 3 Question Code SAS21S101503 Grade & Unit Name Grade 10 | Our Environment Concept | Sub-concept Earth Science | Food Chains and Webs Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Image No Credit (No Score) Any other response or missing response Item Number Question 4 Question Code SAS21S101504 Grade & Unit Name Grade 10 | Our Environment Concept | Sub-concept Earth Science | Fossil Fuels Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. Grass No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Science Class 10 Chapter 15 Page 103 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 15 Item Number Question 5 Question Code SAS21S101505 Grade & Unit Name Grade 10 | Our Environment Concept | Sub-concept Earth Science | Food Chains and Webs Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Level 2 No Credit (No Score) Any other response or missing response Item Number Question 6 Question Code SAS21S101506 Grade & Unit Name Grade 10 | Our Environment Concept | Sub-concept Earth Science | Ozone Layer and Its Depletion Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that UV rays help in splitting oxygen molecules into free oxygen. No Credit (No Score) Any other response or missing response Item Number Question 7 Question Code SAS21S101507 Grade & Unit Name Grade 10 | Our Environment Concept | Sub-concept Earth Science | Ozone Layer and Its Depletion Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. Skin cancer No Credit (No Score) Any other response or missing response Item Number Question 8 Question Code SAS21S101508 Grade & Unit Name Grade 10 | Our Environment Concept | Sub-concept Earth Science | Managing the Garbage We Produce Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions fruit peels as the response. No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 104 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 15 Item Number Question 9 Question Code SAS21S101509 Grade & Unit Name Grade 10 | Our Environment Concept | Sub-concept Earth Science | Managing the Garbage We Produce Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. Composting takes place only in the presence of oxygen. No Credit (No Score) Any other response or missing response Item Number Question 10 Question Code SAS21S101510 Grade & Unit Name Grade 10 | Our Environment Concept | Sub-concept Earth Science | Managing the Garbage We Produce Competency Interpreting Data and Evidence Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) No No Yes No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 105 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 16 Item Number Question 1 Question Code SAS21S101601 Grade & Unit Name Grade 10 | Sustainable Management of Natural Resources Concept | Sub-concept Earth Science | Water Pollution Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) C. Sample 2 and sample 4 are collected from the same water source. No Credit (No Score) Any other response or missing response Item Number Question 2 Question Code SAS21S101602 Grade & Unit Name Grade 10 | Sustainable Management of Natural Resources Concept | Sub-concept Earth Science | Water Pollution Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) A. Sample 1 No Credit (No Score) Any other response or missing response Item Number Question 3 Question Code SAS21S101603 Grade & Unit Name Grade 10 | Sustainable Management of Natural Resources Concept | Sub-concept Earth Science | Water Pollution Competency Evaluating and Designing Scienti ic Enquiry Item Type Complex Multiple Choice Question Full Credit (Full Score) Yes Yes No No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 106 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 16 Item Number Question 4 Question Code SAS21S101604 Grade & Unit Name Grade 10 | Sustainable Management of Natural Resources Concept | Sub-concept Earth Science | Water Pollution Competency Explaining Phenomena Scienti ically Item Type Constructed Response Full Credit (Full Score) Mentions that acidic water can kill many aquatic organisms. For example Many aquatic organisms cannot survive in acidic water. No Credit (No Score) Any other response or missing response Item Number Question 5 Question Code SAS21S101605 Grade & Unit Name Grade 10 | Sustainable Management of Natural Resources Concept | Sub-concept Earth Science | Water Pollution Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) D. Washing Clothes No Credit (No Score) Any other response or missing response Item Number Question 6 Question Code SAS21S101606 Grade & Unit Name Grade 10 | Sustainable Management of Natural Resources Concept | Sub-concept Earth Science | Forest and Wildlife Competency Interpreting Data and Evidence Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Forest 2 No Credit (No Score) Any other response or missing response Item Number Question 7 Question Code SAS21S101607 Grade & Unit Name Grade 10 | Sustainable Management of Natural Resources Concept | Sub-concept Earth Science | Forest and Wildlife Competency Interpreting Data and Evidence Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) C. Forest 3 No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 107 Curriculum Aligned Competency Based Test Items Science Class 10 Chapter 16 Item Number Question 8 Question Code SAS21S101604 Grade & Unit Name Grade 10 | Sustainable Management of Natural Resources Concept | Sub-concept Earth Science | Forest and Wildlife Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Rainforest No Credit (No Score) Any other response or missing response Item Number Question 9 Question Code SAS21S101609 Grade & Unit Name Grade 10 | Sustainable Management of Natural Resources Concept | Sub-concept Earth Science | Coal and Petroleum Competency Explaining Phenomena Scienti ically Item Type Multiple Choice Question Full Credit (Full Score) B. Increase in Global Warming No Credit (No Score) Any other response or missing response Item Number Question 10 Question Code SAS21S101610 Grade & Unit Name Grade 10 | Sustainable Management of Natural Resources Concept | Sub-concept Earth Science | Dams Competency Explaining Phenomena Scienti ically Item Type Complex Multiple Choice Question Full Credit (Full Score) Yes Yes No No Credit (No Score) Any other response or missing response Copyright (c) 2021 CBSE and Sri Aurobindo Society All Rights Reserved Page 108

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