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CuSO(4) solution reacts with excess of K...

`CuSO_(4)` solution reacts with excess of KCN solution to form:-

A

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

B

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

C

`CuCN_(2)`

D

`Cu[KCu(CN)_(4)]`

Text Solution

Verified by Experts

The correct Answer is:
2
Excess of KCN dissolves the precipitate of CuCN forming colourless `[Cu(CN)_(4)]^(3-)`
`CuCN+3CN^(-)rarr[Cu(CN)_(4)]^(3-)`
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