MCQ
$CuS{O_4}$ reacts with $KCN$ solution and forms:
- ✓${K_3}[Cu{(CN)_4}]$
- B$Cu(CN)$
- C$Cu{(CN)_2}$
- D${K_4}[Cu{(CN)_6}]$
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$\begin{array}{*{20}{c}}
{C{H_3} - CH = C - C{H_2} - C{H_3}} \\
{|\,\,} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_2} - C{H_2} - C{H_3}}
\end{array}$