State one appropriate observation for each of the following
Copper sulphide is treated with dilute hydrochloric acid

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Solution

Colorless rotten and gas evolved and a black coloured copper sulphite turns blue.
Reaction- $\underset{Black}{CuS} + \underset{dil}{HCl} \to {CuCl}_{2} + H_{2} S$

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Write a fully balanced equation for each of the following cases:
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Q. State one appropriate observation for each of the following. Copper sulphide is treated with dilute hydrochloric acid.

Q. State one appropriate observation when
(i) Copper sulphide is treated with dilute hydrochloric acid.

Q. State one relevant observation for each of the following reactions:
Action of dilute hydrochloric acid on iron (II) sulphide.

State one relevant observation for each of the following reaction.

Action of dilute Hydrochloric acid on Iron (II) sulphide.

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State one appropriate observation for each of the followingCopper sulphide is treated with dilute hydrochloric acid

Colorless rotten and gas evolved and a black coloured copper sulphite turns blue.Reaction- CuSBlack+HCldil→CuCl2+H2S

State one appropriate observation for each of the following
Copper sulphide is treated with dilute hydrochloric acid

Colorless rotten and gas evolved and a black coloured copper sulphite turns blue.
Reaction- $\underset{Black}{CuS} + \underset{dil}{HCl} \to {CuCl}_{2} + H_{2} S$