1) Copper sulfate solution reacts with KCN to give A) Cu(CN)2 B) CuCN C) K2[Cu(CN)4] D) K3[Cu(CN)4] Answer: Option DExplanation:CuSO4+2KCN→Cu(CN)2+K2SO4 2Cu(CN)2→Cu2(CN)2 OR 2CuCN+CN−CNcyanogen CuCN+3KCN→K3[Cu(CN)4]Colourless
