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

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Solution

When Copper sulphide is treated with dilute hydrochloric acid then hydrogen sulphide gas evolves which has the smell of rotten eggs along with a green-coloured solution.
The reaction involved is :
$C u S + 2 H C l (dil) \to C u C l_{2} + H_{2} S ↑$

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

2.State one appropriate observation for each of following :

(i) Concentrated sulphuric acid is added drop wise to a crystal of hydrated copper sulphate.

(ii) Excess of chlorine gas is reacted with ammonia gas.

(iii) Copper sulphide is treated with dilute hydrochloric acid.

(iv) A few drops of dilute hydrochloric acid are added to silver nitrate solution,followed by addition of ammonium hydroxide solution.

(v) Electricity is passed through molten lead bromide.

Q.  What happens when copper sulphide is treated with dilute hydrochloric acid?

Q. Balance the reaction of copper sulphide with dilute hydrochloric acid.

State one relevant observation for each of the following reaction.

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

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Strength of Acids and Bases

Standard X Chemistry

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

When Copper sulphide is treated with dilute hydrochloric acid then hydrogen sulphide gas evolves which has the smell of rotten eggs along with a green-coloured solution. The reaction involved is : CuS+2HCl(dil)→CuCl2+H2S↑

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

When Copper sulphide is treated with dilute hydrochloric acid then hydrogen sulphide gas evolves which has the smell of rotten eggs along with a green-coloured solution.
The reaction involved is :
$C u S + 2 H C l (dil) \to C u C l_{2} + H_{2} S ↑$