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When `CuSO_(4)` is treated with excess of aq. KCN solution, the species formed is
A. `[Cu(CN)_(4)]^(2-)`
B. `[Cu(CN)_(4)]^(3-)`
C. `Cu(CN)_(2)`
D. `Cu_(2)(CN)_(2)`

1 Answer

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Best answer
Correct Answer - B
`2CuSO_(4)+10KCNrarr2K_(3)[Cu(CN)_(4)]+(CN)_(2)+2K_(2)SO_(4)`

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