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chemistry mock test

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Shrey Seth
St. George's College, Agra
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MOCK TEST PAPER 2 General Instructions : Same as in Sample Question Paper. SECTION-I (40 Marks) Attempt all questions from this Section. Question 1. (a) Name the gas evolved in each of the following: [5] (i) Dilute sulphuric acid reacts with sodium sulphite. (ii) Water is added to calcium carbide. (iii) Magnesium nitride reacts with hot water. (iv) Sodium propanoate is heated with soda lime. (v) Lead di oxide is heated with concentrated hydrochloric acid. (b) State one observation for each of the following : [5] (i) Lead nitrate crystals are strongly heated in a test tube. (ii) Sodium hydroxide solution is added to ferrous sulphate solution. (iii) Ammonium chloride is heated with calcium hydroxide. (iv) Dilute nitric acid and copper turnings are heated. (v) Magnesium ribbon is added to dilute hydrochloric acid. (c) Some word/words are missing in the following statements. Write these statements in correct form. [5] (i) Sodium argento cyanide is used as electrolyte for silve plating. (ii) Barium chloride gives a white precipitate with sodium sulphate. (iii) Sulphuric acid on heating with soidum chloride gives hydrogen chloride gas. (iv) Water on electrolysis gives hydrogen gas at cathode and oxygen gas at anode. (v) Strong electrolytes contain ions as well as molecules in solution. (d) Choose the correct answer from the choices given [5] (i) Metallic oxide which gives a blue solution with dilute sulphuric acid. (a) Calcium oxide (b) Copper oxide (c) Zinc oxide (d) Lead oxide (ii) An ore of zinc is (a) Calamine (b) Bauxite (c) Haematite (d) Cryolite (iii) Metal extracted by electrolysis is (a) Zinc (b) Iron (c) Aluminium (d) Lead (iv) A compound which has ionic, covalent as well as co-ordinate bond is (a) Nitrogen (b) Ammonium chloride (c) Hydrogen chloride (d) Sodium chloride (v) A gas which turns acidified potassium chromate solution orange to green is (a) Carbon dioxide (b) Ammonia (c) Chloride (d) Sulphur dioxide (e) Acetylene buns in air according to the equation. [5] 2C2H2(g) + 5O2(g) 4CO2 (g) + 2H2O (g)

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