Q. Copper sulphate solution reacts with KCN to give
A) $CuCN$
B) $Cu(CN)_{2}$
C) $K_{3}\lbrack Cu(CN)_{4}\rbrack$
D) $K_{2}\lbrack Cu(CN)_{4}\rbrack$
Explanation
(c)
$CuSO_{4} + 2KCN \rightarrow Cu(CN)_{2} + K_{2}SO_{4}$
$2Cu(CN)_{2} \rightarrow Cu_{2}(CN)_{2} + (CN)_{2}$
${Cu}_{2}(CN)_{2} + 6KCN \rightarrow 2K_{3}\lbrack Cu(CN)_{4}\rbrack$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.