ICSE 1999 : SCIENCE Paper 2 (Chemistry) - Question 1(c) Write correct statements.

SCIENCE
Paper 2 (Chemistry) - 1999
(One hour and a half)

Question 1
(c) In this question you are required to supply the word (or words) that will make each sentence into correct statement which is to be written down in full.
Example : Sodium reacts with chlorine to form sodium chloride. Molten sodium reacts with chlorine to form sodium chloride

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1.
(i) The electrolysis of lead bromide liberates lead and bromine.

2.
(ii) Copper sulphate crystals are dehydrated by sulphuric acid.

3.
(iii) Calcium nitrate reacts with sodium sulphate to form calcium sulphate (same is required in two places).

4.
(iv) Crystals of sulphur are obtained when a solution of sulphur in carbon disulphide is allowed to evaporate.

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