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Preparation of Sulphuric Acid: Contact Process

What is The c...

Question

What is The colour of sulphur powder and copper sulphate crystals ?

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Solution

The colour of sulphur powder is pale yellow and colour of copper sulphate crystals is blue.

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Q. What is the colour of copper sulphate crystals? What happens when it is heated?

Q. You are given the following materials:
(i) Iron nails
(ii) Copper sulphate solution
(iii) Barium chloride solution
(iv) Copper powder
(v) Ferrous sulphate crystals
(vi) Quicklime

Identify the type of chemical reaction taking place when:
(a) Barium chloride solution is mixed with copper sulphate solution and a white precipitate is observed.
(b) On heating copper powder in air in a china dish, the surface of copper powder turns black.
(c) On heating green coloured ferrous sulphate crystals, reddish brown solid is left and smell of a gas having odour of burning sulphur is experienced.
(d) Iron nails when left dipped in blue colour copper sulphate solution become brownish in colour and the blue colour of copper sulphate fades away.
(e) Quick lime reacts vigorously with water releasing a large amount of heat.
Write chemical equations for each one of the above reactions.

What is the color of copper sulphate crystals?

Q. The blue coloured copper sulphate crystals turn white when treated with sulphuric acid. This is due to the nature of the acid.

What happen when copper sulphate crystals are heated in a test tube?

Statements:
i. It loses its water of crystallization
ii. White coloured powder is formed
Select the correct options for both statements.

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