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ICSE Class X Board Exam 2000 : Chemistry

6 pages, 60 questions, 60 questions with responses, 100 total responses,    0    0
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Indian Certificate of Secondary Education (ICSE), New Delhi
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SCIENCE Paper 2 (Chemistry) - 2000 (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) From the following list of substances, choose the one substance in each case which matches the description (i) to (vi) given below. (Write down the names exactly as they are given in the list. Do not write formulae.) onium nitrate, calcium hydrogen carbonate, copper carbonate, lead carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate, zinc carbonate. [6] 1. (i) A hydrogen carbonate which exists in the solid state. 2. (ii) A carbonate not decomposed by heat. 3. (iii) A green coloured carbonate which turns black on heating. 4. (iv) A nitrate which gives off only oxygen when heated. 5. (v) A nitrate which on heating decomposes into dinitrogen oxide (nitrous oxide) and steam. 6. (vi) A nitrate which gives off oxygen and nitrogen dioxide when heated. Question 1 (b) [6] 7. (i) What is the volume (measured in dm3 or litres) occupied by one mole of a gas at STP? 8. (ii) 112 cm3 (at STP) of a gaseous fluoride of phosphorus has a mass of 0.63g. Calculate the relative molecular mass of the fluoride. If the molecule of the fluoride contains only one atom of phosphorus, then determine the formula of the phosphorus fluoride. (F = 19; P = 31)

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Additional Info : Solved ICSE Board exam paper study guide - ICSE 2000 : SCIENCE Paper 2 (Chemistry) - I.C.S.E. Free Online Question Paper
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