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ICSE Class X Board Exam 1998 : Chemistry

7 pages, 80 questions, 80 questions with responses, 121 total responses,    0    0
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Indian Certificate of Secondary Education (ICSE), New Delhi
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SCIENCE Paper 2 (Chemistry) - 1998 (One hour and a half) Answers 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 in reading the Question Paper. The time given at the head of this paper is the time allowed for writing the answers. Section I is compulsory. Attempt any four questions from Section II. The intended marks for questions or parts of questions are given in brackets [ ]. S ECTION I (40 Marks) Attempt all questions from this Section Question 1 (a) Answer the questions below, relating your answers only to salts in the following list: sodium chloride, anhydrous calcium chloride, copper sulphate-5-water. [5] (i) What name is given to the water in the compound copper sulphate-5-water? (ii) If copper sulphate-5-water is heated, the water is driven off leaving anhydrous copper sulphate. (1) What is the colour of anhydrous copper sulphate? (2 ) By what means, other than heating could you dehydrate copper sulphate-5-water and obtain anhydrous copper sulphate? (iii) What is deliquescence? (iv) Which one of the salts in the given list is deliquescent? Question 1 (b) State what you see when: (i) A piece of moist blue litmus paper is placed in a gas jar of chlorine. (ii) A piece of moist red litmus paper is placed in a gas jar of ammonia. (iii) Silver nitrate solution is added to dilute hydrochloric acid. (iv) Zinc oxide is heated. (v) A glowing splint is introduced into a gas jar containing oxygen. [5]

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Additional Info : Solved ICSE Board exam paper study guide - ICSE 1998 : SCIENCE Paper 2 (Chemistry) - I.C.S.E. Free Online Question Paper
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