d and f-Block ElementsHard
Question
CuSO4 decolourises on addition of KCN, the product is
Options
A.[Cu(CN)4]2
B.Cu2+ get reduced to form [Cu(CN)4]3-
C.Cu(CN)2
D.CuCN
Solution
Cu+2 + 2CN- → Cu(CN)2
2Cu(CN)2 → 2CuCN + (CN)2
2Cu(CN)2 → 2CuCN + (CN)2
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