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ICSE Board Exam 2004 : Chemistry

7 pages, 77 questions, 74 questions with responses, 111 total responses,    0    0
Indian Certificate of Secondary Education (ICSE), New Delhi
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SCIENCE Paper 2 (Chemistry) - 2004 (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) Choose the letters A, B, C or D to match the descriptions from (i) to (vi) given below: A. Ammonia B. Hydrogen Chloride C. Hydrogen sulphide D. Sulphur dioxide. [6] (i) This gas can be oxidized to sulphur. (ii) This gas decolourises potassium permanganate solution. (iii) When this gas is bubbled through copper sulphate solution, a deep blue coloured solution is formed. (iv) This gas gives a white precipitate when reacted with silver nitrate solution acidified with dilute nitric acid. (v) This gas burns in oxygen with a green flame. (vi) This gas can be obtained by the reaction between copper and concentrated sulphuric acid. Question 1 (b) When heated, potassium permanganate decomposes according to the following equation 2KM nO4 K2M nO4+ M nO2 + O2 Solid residue [6] (i) Some potassium permanganate was heated in a test tube. After collecting one litre of oxygen at room

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Additional Info : Solved ICSE Board exam paper study guide - ICSE 2004 : SCIENCE Paper 2 (Chemistry) - I.C.S.E. Free Online Question Paper
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