AIPMT PRELIMS2002Chemistry-Coordination Compounds
AIPMT PRELIMS 2002 Chemistry Complex Formation MCQ Question
Type: MCQ-conceptual-Medium-Class 12
CuSO₄ when reacts with KCN forms CuCN, which is insoluble in water. It is soluble in excess of KCN, due to formation of the following complex :-
A
K₂[Cu(CN)₄]
B
K₃[Cu(CN)₄]
C
CuCN₂
D
Cu[KCu(CN)₄]
Correct Answer
Option B
Detailed Explanation
In excess KCN, CuCN forms the soluble complex K₂[Cu(CN)₄], allowing it to dissolve.
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