Copper sulphate dissolved in excess of KCN to give:-A. CuCNB. `[Cu(CN)_(4)]^(3–)`C. ` [Cu(CN)_(4)]^(2–) `D. `Cu(CN)_(2)`

Copper sulphate dissolved in excess of KCN to give:-A. CuCNB. `[Cu(CN)

1.	Copper sulphate dissolved in excess of KCN to give:-A. CuCNB. `[Cu(CN)_(4)]^(3–)`C. ` [Cu(CN)_(4)]^(2–) `D. `Cu(CN)_(2)`
Answer» Correct Answer - B `2KCN+CuSO_(4)+CU(CN)_(2)` `Cu(CN)_(2)toCuCN+(CN)_(2) "unstable"` `CuCN+3KCNtoK_(3)[Cu(CN)_(4)]i.e.[Cu(CN)_(4)]^(3-)`

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Copper sulphate dissolved in excess of KCN to give:-A. CuCNB. `[Cu(CN)_(4)]^(3–)`C. ` [Cu(CN)_(4)]^(2–) `D. `Cu(CN)_(2)`

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