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CuSO(4) decolourises on addition of KCN,...

`CuSO_(4)` decolourises on addition of `KCN`, the product is

A

`[Cu(CN)_(4)]^(2–)`

B

` Cu^(2+)` get reduced to form `[Cu(CN)_(4)]^(3–)`

C

`Cu(CN)_(2)`

D

CuCN

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The correct Answer is:
D
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