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ICSE Class X Board Exam 2025 : Biology

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Rupan Banik
Tripura University (TU), Agartala
Msc Biochemistry Biology
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Chemistry Chapter 8- Study of Compounds Sample Paper-1 MM.25 General Instruction: I. All questions are compulsory. II. Question No. 1 and 2 carry one mark each. III. Question No. 3 to 5 carries two marks each. IV. Question No. 6 to 9 carries three marks each. V. Question No.10 carries 5 marks. Question 1: Write an equation for the action of heat on potassium nitrate. (1) Question 2: Ammonia can be obtained adding water to: (1) a. b. c. d. Ammonium chloride Ammonium nitrate Magnesium nitride Magnesium nitrate. Question 3: (2) From the list of substances given Ammonium sulphate, Lead carbonate, Chlorine, Copper nitrate, Ferrous sulphate State: A compound which on heating with sodium hydroxide produces a gas which forms dense white fumes with hydrogen chloride. Question 4: a. Write the equation for the formation of ammonia by the action of water on magnesium nitride. b. Write the equation for the reaction of Aluminium nitride and water. (2) Question 5: (2) a. State what you observe when silver nitrate solution is added to dilute hydrochloric acid. b. From the gases ammonia, hydrogen chloride, hydrogen sulphide, Sulphur dioxide Select the following: The gas which gives a white ppt. when reacted with AgNO3 soln. acidified with dilute nitric acid. Question 6: (3) Write the equation for the laboratory preparation of Sulphur dioxide from sodium sulphite. a. How is the SO2 collected? b. What does the method of collection tell you about the density of SO2? c. What do you see when SO2 is bubbled through an acidified K2Cr2O7 solution Question 7: (3) a. Write an equation for solutions of ammonium chloride and sodium hydroxide are heated. b. Ammonium salts decompose on heating. What other property do ammonium salts have in common? c. Choose the correct word from the bracket and write a balanced equation for the same: Heating ammonium chloride with sodium hydroxide produces ______ [ammonia / nitrogen]. Question 8: (3) From the gas s ammonia, hydrogen chloride, hydrogen sulphide, sulphur dioxide Select the following: a. This gas can be oxidized to sulphur. b. This gas decolourises potassium permanganate solution. c. This gas can be obtained by the reaction between copper and concentrated sulphuric acid. Question 9: a. The following reactions are carried out: A: Nitrogen + Metal Compound X. (3) B: X + Water Ammonia + Another compound. C: Ammonia + Metal oxide Metal + Water + N2. One metal that can be used for reaction A is magnesium. i. ii. iii. Write the formula of the compound X formed. Write the correctly balanced equation for reaction B where X is the compound formed. What property of ammonia is demonstrated by reaction C. Question 10: (5) Some properties of Sulphuric acid are listed below. Choose the property A, B, C or D which is responsible for the reactions (i) to (v). Some properties may be repeated: A. Acid; B. Dehydrating agent; C. Non-volatile acid; D. Oxidizing agent. a. b. c. d. e. C12H22O11 + nH2SO4 12C + 11H2O + nH2SO4 S + 2H2SO4 3SO2 + 2H2O NaCl + H2SO4 NaHSO4 + HCl CuO + H2SO4 CuSO4 + H2O Na2CO3 + H2SO4 Na2SO4 + H2O + CO2

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