Question

5. When copper sulphide is treated with
hydrochloric acid it gives off a gas
which has a foul smell.​

Answer 1

Answer:

Copper sulphide is treated with dilute hydrochloric acid. Excess of chlorine gas is reacted with ammonia gas. A few drops of dilute hydrochloric acid are added to silver nitrate solution, followed by addition of ammonium hydroxide solution.

Explanation:

Hope it helps you.

Answer 2

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