A) \[Cu{{(CN)}_{2}}\]
B) \[CuCN\]
C) \[{{K}_{2}}[Cu{{(CN)}_{4}}]\]
D) \[{{K}_{3}}[Cu{{(CN)}_{4}}]\]
Correct Answer: D
Solution :
\[CuS{{O}_{4}}+2KCN\to Cu{{(CN)}_{2}}+{{K}_{2}}S{{O}_{4}}\] \[2Cu{{(CN)}_{2}}\to C{{u}_{2}}{{(CN)}_{2}}+{{(CN)}_{2}}\] \[C{{u}_{2}}{{(CN)}_{2}}+6KCN\to 2{{K}_{3}}[Cu{{(CN)}_{4}}]\]
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