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CuSO4 decolourises on addition of KCN, the product is (A) [Cu(CN)4] 2− (B) Cu2+ get reduced to form [Cu(CN)4] 3− (C) Cu(CN)2 (D) CuCN CuSO4 decolourises on addition of KCN, the product is (A) [Cu(CN)4] 2− (B) Cu2+ get reduced to form [Cu(CN)4] 3− (C) Cu(CN)2 (D) CuCN
(D)
Initially [Cu(CN)4]2- is formed and later Cu2+ reduces to Cu+ Releasing cyanogen GasHence answer is (B)
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