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ICSE Class X Board Exam 2005 : Chemistry

9 pages, 94 questions, 95 questions with responses, 181 total responses,    0    0
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Indian Certificate of Secondary Education (ICSE), New Delhi
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SCIENCE Paper 2 (Chemistry) - 2005 (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) Write balanced equations for the following reactions:- [5] (i) Potassium hydrogen carbonate and dilute Sulphuric acid. (ii) Copper oxide and dilute Hydrochloric acid. (iii) M anganese (IV) oxide and concentrated Hydrochloric acid. (iv) Sulphur and hot concentrated Nitric acid. (v) Sodium nitrate and concentrated Sulphuric acid. Question 1 (b) The volumes of gases A, B, C and D are in the ratio, 1 : 2 : 2 : 4 under the same conditions of temperature and pressure:- [5] (i) Which sample of gas contains the maximum number of molecules? (ii) If the temperature and the pressure of gas A are kept constant, then what will happen to the volume of A when the number of molecules is doubled? (iii) If this ratio of gas volumes refers to the reactants and products of a reaction, which gas law is being observed? (iv) If the volume of A is actually 5.6 dm3 at S.T.P., calculate the number of molecules in the actual

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Additional Info : Solved ICSE Board exam paper study guide - ICSE 2005 : SCIENCE Paper 2 (Chemistry) - I.C.S.E. Free Online Question Paper
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