Question

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

Answer:

displacement reaction

Answer 2

Answer:

Double displacement reaction

Explanation:

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