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ICSE Class X Board Exam 2025 : 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.

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