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CuSO4 , solution with excess of KCN give...

`CuSO_4` , solution with excess of KCN gives __________.

A

`Cu(CN)_2`

B

CuCN

C

`K_2[Cu(CN)_4]`

D

`K_2[Cu(CN)_4]`

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The correct Answer is:
C
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