Question

Q3. When hydrogen sulphide gas is passed through a blue solution of copper sulphate,

a black precipitate of copper sulphide is obtained and the sulphuric acid so formed

remains in the solution. The reaction is an example of a:

(a) Combination reaction (b) Displacement reaction

(c) Decomposition reaction (d) Double displacement reaction





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Answer 1

⚛ Solution ⚛

The reaction is double displacement reaction.

Option D.

Equation :

CuSO4 + H2S⟶ Cu2S + H2SO4

Definition:

Double displacement reaction is a rection in which exchange of ions occur.

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Answer 2

Answer:

Double Displacement Reaction

Explanation:

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