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ICSE Class X Board Exam 2003 : Chemistry

6 pages, 62 questions, 62 questions with responses, 95 total responses,    0    0
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Indian Certificate of Secondary Education (ICSE), New Delhi
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SCIENCE Paper 2 (Chemistry) - 2003 (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 [5] Question 1 (a) (i)What volume of oxygen is required to burn completely a mixture of 22.4 dm3of methane and 11.2 dm3 of hydrogen into carbon dioxide and steam? Equations of the reactions are given below (Assume that all volumes are measured at S.T.P ) CH4 + 2O2 CO2 + 2H2O 2H2 + O2 2H2O (ii) The gases hydrogen oxygen, carbon dioxide, sulphur dioxide and chlorine are arranged in order of their increasing relative molecular mass. Given 8g of each gas at STP, which gas will contain the least number of molecules and which gas the most? Question 1 [10] (b) M atch the description in column X with the appropriate substance in column Y. Write down the number of the description with the letter of the substance. The first one has been done for you. X 1. A gas whose solution in water is alkaline Y A. Hydrogen sulphide

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Additional Info : Solved ICSE Board exam paper study guide - ICSE 2003 : SCIENCE Paper 2 (Chemistry) - I.C.S.E. Free Online Question Paper
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