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Copper sulphate dissolved in excess of K...

Copper sulphate dissolved in excess of KCN to give:-

A

`Cu(CN)_(2)`

B

`CuCN`

C

`[Cu(CN)_(4)]^(3-)`

D

`[Cu(CN)_(4)]^(2-)`

Text Solution

Verified by Experts

The correct Answer is:
C
The chmical reaction involved are :
`CuSO_4 `+ 2KCN `` `Cu(CN)_2` + `K_(2)SO_(4) xx 2`
`2Cu(CN)_2` `` `Cu_(2)(CN)_2` + `(CN)_2`
`Cu_2(CN)_2` + 6KCN `` `2K_(3)Cu(CN)_4`
`CuSO_(4)` + 10KCN `` `2K_(3)[Cu(CN)_4`] + `2K_(2)SO_(4)` + `(CN)_(2)`
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