MCQ
$CuS{O_4}$ reacts with $KCN$ solution and forms
- A$Cu{(CN)_2}$
- B$Cu(CN)$
- C${K_2}\left[ {Cu{{(CN)}_4}} \right]$
- ✓${K_3}\left[ {Cu{{\left( {CN} \right)}_4}} \right]$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

$\begin{array}{*{20}{c}}
H\\
|\\
{ClHC = HC - C - CH = CHCl}\\
|\\
{Cl}
\end{array}$

$A$. $\mathrm{Fe}$ $B$. $\mathrm{Mn}$ $C$. $\mathrm{Ni}$ $D$. $\mathrm{Cr}$ $E$. $\mathrm{Cd}$
Choose the correct answer from the options given below: