MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryCoordination compoundsIntroduction of Coordination Compounds
Which compound is formed when excess of KCN is added to aqueous solution of copper sulphate?
A.Cu (CN)2
B.K2 [Cu (CN)4]
C.K [Cu (CN)2]
D.K3 [Cu (CN)4]✓ Correct
Explanation
The reaction between 4 CuSO and KCN is given below: 4 2 2 4 2 2 3 4 CuSO + 2KCN Cu(CN) +K SO Cu(CN) 2CuCN+(CN) CuCN+6KCN 2K [Cu(CN) ] -> -> -> Hence, the correct answer is option (d)
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