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If excess of KCN is added to a solution ...

If excess of KCN is added to a solution containing `Cu^(2+)` and `Cd^(2+)` and then `H_(2)S` is passes through it -

A

both CuS and CdS get precipitated

B

soluble ions of `[Cu(CN)_(4)]^(3-)` and `[Cd(CN)_(4)]^(2-)` are formed and there is no effect of passing `H_(2)S` through the solution

C

Soluble ions of `[Cu(CN)_(4)]^(3-)` and `[Cd(CN)_(4)]^(2-)` are formed from which yellow CdS is precipitated

D

soluble ions of `[Cu(CN)_(4)]^(3-)` and `[Cd(CN)_(4)]^(2-)` are formed from which black CuS is precipitated

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The correct Answer is:
C
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CHHAYA PUBLICATION-D - AND F - BLOCK ELEMENTS -MCQ (Single Correct Type)
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  14. The aqueous solutions having the same colour are observed in case of -

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