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ICSE Class X Prelims 2020 : Chemistry : CONCEPTUAL and SUGGESTIVE

8 pages, 109 questions, 79 questions with responses, 88 total responses,    2    2
Alan
Brindavan Vidyalaya, Tiruchirappalli
1st to 10th
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CHEMISTRY SCIENCE PAPER 2 (2 hours) Answer to this Paper must be written on the paper provided separately. You will not be allowed to write during the first 15 minutes. This time is to be spent reading the question paper. The time given at the head of this paper is the time allowed for writing the answers. Attempt all the questions in Section I and any 4 from Section II. The intended marks for questions is given in the brackets [ ]. SECTION I (40 marks) Attempt all the questions from this section Question 1 (a) Choose the right answer from the options given below: (i) [5] Dilute sulfuric acid is added to the electrolyte aqueous copper sulfate because it: A. Enhances conductivity of the electrolyte. B. Prevents hydrolysis of the electrolyte. C. Both A & B. D. None of the above. (ii) Which of the following reactions will take place? [Hence, write a balanced equation for the chosen reaction.] A. Mg + CaSO4 B. Al + FeCl3 C. Pb + NaNO3 D. Ag + CuSO4 (iii) The volume of oxygen required and volume of nitric oxide formed when 100 ml of ammonia is catalytically oxidized is: A. 125 ml of O2 and NO each B. 125 ml of O2 and 100 ml NO C. 100 ml of O2 and NO each D. 125 ml of O2 and 100 ml of NO 1 Turn Over

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