$(i)$ ${C_6}{H_5}{N^ + } \equiv NC{l^ - }$ $(ii)$ ${C_6}{H_5}{N^ + } \equiv N$
$(iii)$ ${{\overset{\centerdot }{\mathop{C}}\,}_{6}}{{H}_{5}}$ $(iv)$ $C_6H_5Cl$

$1. \,{H_3}C - \mathop O\limits^ +  {H_2} \to CH_3^ +  + {H_2}O$

$2.\,{(C{H_3})_3}C - \mathop O\limits^ +  {H_2} \to {(C{H_3})_3}{C^ + } + {H_2}O$

$3.\,{(C{H_3})_2}CH - \mathop O\limits^ +  {H_2} \to {(C{H_3})_2}C{H^ + } + {H_2}O$

$\begin{matrix}
   \overset{\Theta }{\mathop{\overset{\centerdot \,\centerdot }{\mathop{C}}\,}}\,{{H}_{2}}-C-C{{H}_{3}}  \\
   ||  \\
   O  \\
\end{matrix}$ અને $\begin{matrix}
   C{{H}_{2}}=C-C{{H}_{3}}  \\
   |  \\
   :\underset{\Theta }{\mathop{\underset{\centerdot \,\centerdot }{\mathop{O}}\,}}\,:  \\
\end{matrix}$