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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» The correct option is (d) Double displacement reaction. The reactions in which two compounds react by an exchange of ions to form two new compounds are called double displacement reactions. |
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