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in d-and f-Block Elements by (45.1k points)
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Copper sulphate dissolves in excess of KCN to give

(a) Cu(CN)2 

(b) CuCN

(c) [Cu(CN)4]3-

(d) [Cu(CN)4]2-

1 Answer

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Best answer

Correct option (c) [Cu(CN)4]3-

Explanation :

First cupric cyanide is formed which decomposes to give cuprous cyanide and cyanogen gas. Cuprous cyanide dissolves in excess of potassium cyanide to form a complex, potassium cyanide [K3Cu(CN)4].

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