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Copper sulphate dissolved in excess of KCN to give:-

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