
	Trending ▼ ICSE CBSE 10th ISC CBSE 12th CTET GATE UGC NET Vestibulares ResFinder

ICSE Class X Prelims 2026 : Chemistry (Karnataka ICSE Schools Association KISA, Bengaluru)

11 pages, 124 questions, 0 questions with responses, 0 total responses,

Ronit
Karnataka ICSE Schools Association KISA, Bengaluru
10th pcmb + humanities

+Fave Message

Profile Timeline Uploads

Home > unableoven > F Also featured on: School Page

Formatting page ...

KARNATAKA ICSE SCHOOLS ASSOCIATION ICSE STD. X Preparatory Examination 2026 Duration: 2 Hr. Subject CHEMISTRY (SCIENCE PAPER 2) Maximum Marks: 80 Date: 09.01.2026 General Instructions: 1. Answers to this paper must be written on the paper provided separately. 2. You will not be allowed to write during the first 15 minutes. 3. This time is to be spent in reading the Question Paper. 4. The time given at the head of this Paper is the time allotted for writing the answers. 5. Section A is compulsory. Attempt any four questions from Section B. 6. The intended marks for questions or parts of questions are given in brackets []. SECTION A (40 Marks) (Attempt all questions from this section.) Question 1 Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.) (i) (ii) Which of the following pairs are non-polar covalent compounds? 1. Hydrogen chloride 2. Carbon tetrachloride 3. Sodium chloride 4. Methane (a) 1 and 2 (b) 2 and 4 (c) 1 and 3 (d) 2 and 3 Which of the following are the raw materials for the preparation of a fruit smelling compound in the presence a non-volatile strong acid? 1. Acetic acid 2. Ethane 3. Ethanol 4. Ethanal (a) 1 and 3 (b) 2 and 3 (c) 1 and 2 (d) 2 and 4 1 (iii) Assertion (A): Aluminium is extracted by electrolytic reduction method. Reason (R): Aluminium is amphoteric in nature. (a) (A) is true and (R) is false. (b) (A) is false and (R) is true. (c) Both (A) and (R) are true and (R) is the correct explanation of (A). (d) Both (A) and (R) are true, but (R) is not the correct explanation of (A). (iv) Identify the correct ionization equation for a divalent metal 'M'. (a) M + 1e ---------> M1+ (b) M - 2e ----------> M2+ (c) M + 2e -------- > M2+ (d) M - 2e ---------> M2- (v) A student Raghava wanted to electroplate locker key with gold. So he arranged the setup as shown in the below figure. Which of the following holds good for the same? (a) Electrolyte: Gold solution, X - Cathode: Impure gold metal rod, Y - Anode: Key (b) Electrolyte: Gold solution, Y - Cathode: Key, X - Anode: Pure gold metal rod (c) Electrolyte: Gold solution, X - Cathode: Key, Y - Anode: Impure gold metal rod (d) Electrolyte: Gold solution, Y - Cathode: Pure gold metal rod, Y - Anode: Key (vi) The correct arrangement of elements with their no. of electron shells is: (a) He < C < Al < Ca (b) Ca < C < Si < P 2 (c) Na > F > Si < K (d) H < Na < Li < N (vii) Which of the following is correct in the electron dot diagram of acetate ion? C-H Bond (viii) C-C Bond C-O Single C-O Double Charge on Bond Bond acetate ion (a) 3 1 1 1 + (b) 3 2 2 1 + (c) 2 1 1 2 - (d) 3 1 1 1 - The metal oxide which produces salt and water with acid as well as alkali is: (a) K2O (b) Al2O3 (c) Na2O (d) Ca2O (ix) Which of the following pairs have the same empirical formula? 1. Methanol 2. Glucose 3. Acetic acid 4. Benzene (a) 1 and 3 (b) 2 and 3 (c) 1 and 4 (d) 3 and 4 (x) Which of the following metal nitrate produces reddish brown coloured gas upon heating? (a) Lead nitrate (b) Potassium nitrate (c) Sodium nitrate (d) None of these 3 (xi) Which of the following method is used in the concentration of bauxite ore? (a) Gravity Separation (b) Froth Floatation (c) Leaching (d) Magnetic Separation (xii) The number of covalent bonds present in ammonium chloride is: (a) 3 (b) 4 (c) 5 (d) 2 (xiii) The ion which do not form precipitate with weak alkali is: (a) Ferric ion (b) Cuprous ion (c) Calcium ion (d) Ferrous ion (xiv) What property of dilute sulphuric acid can be demonstrated by treating it with ammonium carbonate salt to obtain carbon dioxide gas? (a) Oxidising property (b) Acidic property (c) Drying property (d) Dehydrating property (xv) Dry ammonia gas does not change the red litmus to blue. Which of the following statements are true for this statement? 4 1. Ammonia gas is acidic in nature. 2. Ammonia gas does not ionise in gaseous state. 3. Ammonia gas is basic in nature. 4. Ammonia gas does not ionise in the absence of water. (a) Statements 1 and 2 (b) Statements 1 and 4 (c) Statements 3 and 2 (d) Statements 3 and 4 Question 2 (i) Read the passage below and answer the questions that follows: [5] Raman treated the crushed egg shells with dilute hydrochloric acid in a test tube. The effervescence was seen, when this gas was passed through freshly prepared lime water, it turned lime water milky and when passed over acidified potassium permanganate, no change in the colour was observed. (a) Name the gas obtained by Raman. (b) Name the type of bonding present in the gas molecule. (c) Write the electron dot structure for this molecule. (d) Write the chemical equation for the dissolution of this gas in water. (e) What is the nature of the solution formed in question (d)? (ii) Complete the following by choosing the correct answers from the bracket: [5] (a) The bulb glows when connected across the electrolytic cell. This is due to movement of ______________(ions/electrons/molecules) in the electrolyte. (b) The ___________(blue/yellow/green) flame was formed when methane gas was burnt in the limited supply of oxygen. (c) The acid which turns sugar to sugar charcoal is ______________. (Dil. Sulphuric acid/Con. Hydrochloride acid/Con. Sulphuric acid) (d) The electron affinity across the period ______________(increases/decreases/remains same) in the periodic table. (e) The no. of non-ionisable hydrogen atoms present in a molecule of acetic acid are ______. (4/3/2) 5 (iii) Answer the following questions based on the part of the periodic table given below: Group 1 Group 2 Group 3 A Group 4 Group 5 Group 6 E B Mg C D F Si I G H [5] Group 7 Group 0 J Ne K L M (a) Identify the elements J and K (b) Which is the most reducing element? (c) Write the ionisation equation of the element E . (d) Name the element which has valency -2. (e) Which element has the least atomic size? (iv) Match the Column A with Column B: [5] Column A Column B (a) Cinnabar 1. Drying agent (b) Calcium chloride 2. Calcination (c) Carbonate ores 3. Palladium (d) Hydrogenation 4. Dehydrating agent (e) Con. Sulphuric acid 5. Froth flotation (v) (a) Give the IUPAC name of the following organic compounds: 1. 2. 6 [2] (b) Draw the structural diagram for the following compounds: [3] 1. 2 methyl propanoic acid 2. 3 pentanol 3. 1,2 dichloro ethane SECTION B (40 Marks) (Attempt any four questions from this Section.) Question 3 (i) Sowmya of class 10th was checking the nature of the given samples by using litmus and other indicators. The samples and results are recorded below in the table. Answer the questions that follow. [4] Sample Result A Colourless phenolphthalein changes to pink B Blue litmus changes to red C No effect on litmus papers (both wet and dry) D Methyl orange remains orange (a) Which sample can be used to produce hydrogen sulphide gas from calcium sulphide? (b) Which sample may be non electrolyte? (c) Which sample may have pH equal to 7? (d) Which sample may have pH less than 7? (ii) Identify the following: [3] (a) The half of the inter-nuclei distance in a diatomic molecule. (b) The ability of an atom to join with same type atoms to form the longest chain. (c) The volume occupied by one mole of any gas at STP. 7 (iii) Write the balanced equations for the following conversions. [3] (a) Ammonia from ammonium sulphate. (b) Iron[II] chloride from Iron. (c) Silver chloride from silver nitrate. Question 4 (i) Calculate the empirical formula and molecular formula of an organic compound with molecular mass 180 g and having the following percentage composition. [4] Composition: 6.67% hydrogen, 53.33% oxygen and the rest is being carbon. [C-12, H-1 & O-16] (ii) State one relevant observation for the following. [3] (a) Dry sulphur dioxide gas passed through acidified potassium permanganate solution. (b) Zinc oxide is heated. (c) Excess chlorine gas is passed over wet blue litmus paper. (iii) Rewrite the following statements using missing word/s: [3] (a) Ethyl alcohol is a hydrocarbon. (b) Sulphuric acid is a good dehydrating agent. (c) HCl gas does not turn dry blue litmus to red. Question 5 (i) Draw the electron dot diagram for the following. [3] (a) A positive ion formed when ammonia gas is converted into ammonia solution. (b) A product obtained when calcium is burnt directly in the atmospheric oxygen. (c) An inert gas present in the atmospheric air in large quantity. (ii) Identify the products P, Q and R in the following. 8 [3] Boil (a) C2H5Cl + KOH -------------------> P + KCl 140 C - 150 C (b) Al2O3.2H2O + NaOH ----------------------------> Q + H2O Pt (c) C2H2 + H2 ---------------------> R (iii) Answer the following questions that are related to Hall-Heroult's process [electrolytic reduction of alumia] [4] (a) Write the reaction that takes place at cathode. (b) Why is the electrolytic cell made with a sloping bottom? (c) What is the role of coke powder sprinkled over the electrolyte? (d) Name the 2 constituents of electrolytic mixture other than alumina. Question 6 (i) One of the applications of electrolysis is shown in the below diagram. Answer the following questions with respect to the diagram. [4] (a) Identify the cation present in the electrolyte. (b) Write the reaction that takes place at anode. (c) Identify the process shown in the above diagram. (d) Name X 9 (ii) Identify the best option from the given box for the following. [4] Lead nitrate, Sulphuric acid, Benzene, Ferric chloride, Ferrous chloride, Sugar, Nitric acid (a) A binary salt prepared by synthesis method. (b) A substance on hydrolysis gives any positive ion other than hydrogen ion and any negative ion other than hydroxyl ion. (c) A liquid which produces reddish brown coloured gas on thermal decomposition. (d) A substance which cannot be used as a drying agent in the preparation of ammonia gas. (iii) Give reason for the following. [2] (a) Solid sodium chloride does not conduct electricity. (b) Alumina cannot be reduced by carbon. Question 7 (i) Identify the gas liberated in the given following tests. [4] (a) Strong heating of lead nitrate salt. (b) Carbon is dropped in the concentrated sulphuric acid. (c) Ammonia gas is passed over heated copper oxide. (d) Water is sprinkled over calcium carbide. (ii) State the property exhibited by the corresponding acid in the given following tests. [4] (a) H2SO4 is used in the preparation of HCl gas. (b) HCl acid is used to obtain SO2 gas from metal sulphite salts. (c) On treating carbon with con. nitric acid to get CO2. (d) On treating sugar with con. sulphuric acid to get sugar charcoal. (iii) Identify the main metal present in the following ores. (a) Haematite (b) Calamine 10 [2] Question 8 (i) Ananya was preparing ammonia gas in the laboratory as per the given below setup. Answer the following questions by selecting suitable substance/s from the given list. [4] Con. Sulphuric acid, Water, Calcium nitrate, Ammonium hydroxide, Magnesium nitride, Lumps of calcium oxide, Con. Nitric acid, Hydrochloric acid (a) Identify the reactants that she can use for the preparation of ammonia. (b) Write the balanced equation for the above preparation of ammonia. (c) Name the drying agent. (d) Which substance can be used to test whether the gas jar is filled or not? (ii) (a) Calculate the volume of oxygen gas required to burn completely 30.0 ml of ethane and also calculate the volume of carbon dioxide formed. [C-12, H-1 & O-16] [2] (b) Calculate the total volume of gaseous mixture formed at STP when 165.5 g of lead nitrate is heated. [2] Pb(NO3)2 ---------------->PbO + NO2 +O2 (iii) [Pb-207, N-14, O-16] Copy and complete the following table. Chemical Equation [2] Name of the process NH3 + O2 -----Pt------> NO + H2O Identify A. Oxidised substance B. Reduced product A._____________ B.____________ 11

Formatting page ...

unableoven chat

Horizontal lines at:
Guest Horizontal lines at:
AutoRM Data:
Box geometries: