ICSE 2000 : SCIENCE Paper 2 (Chemistry)

SCIENCE
Paper 2 (Chemistry) - 2000
(One hour and a half)

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.

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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.

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