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Copper sulphate solution reacts with KCN...

Copper sulphate solution reacts with `KCN` to give
(a) `Cu(CN)_(2)`
(b) `CuCN`
(c ) `K_(2)[Cu(CN)_(4)]`
(d) `K_(3)[Cu(CN)_(4)]` .

A

`Cu(CN)_(2)`

B

`CuCN`

C

`K_(2) [Cu (CN)_(4)]`

D

`K_(3) [Cu (CN)_(4)]`

Text Solution

Verified by Experts

The correct Answer is:
D
`CuSO_(4) + 2KCN rarr Cu (CN)_(2) + K_(2) SO_(4)`
`2Cu (CN)_(2) rarr Cu_(2) (CN)_(2) + (CN)_(2)`
`Cu_(2) (CN)_(2) + 6 KCN rarr 2 K_(3) [Cu(CN)_(4)]`
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