A) \[Cu{{(CN)}_{2}}\]
B) \[Cu(CN)\]
C) \[{{K}_{2}}\left[ Cu{{(CN)}_{4}} \right]\]
D) \[{{K}_{3}}\left[ Cu{{\left( CN \right)}_{4}} \right]\]
Correct Answer: D
Solution :
\[4KCN+CuS{{O}_{4}}\to \underset{\text{Potassium tetracyno cuprate}}{\mathop{{{K}_{3}}[Cu{{(CN)}_{4}}]\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,\]
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