Chemistry - Halogen Derivative Question with Solution | TestHub

Halogen have$-\mathrm{I}$and$+\mathrm{M}$effect by which its electron delocalized in benzene ring by resonance & due to its$-\mathrm{I}$effect its bonded with benzene ring and cannot be substitute by$\mathrm{C}{\mathrm{N}}^{-}$& show the inertness against nucleophilic substitution with$\mathrm{K}\mathrm{C}\mathrm{N}$while other option gives Aromatic nitrile
$\mathrm{A}\mathrm{r}{\mathrm{N}}_2^{+}+\mathrm{C}\mathrm{u}\mathrm{C}\mathrm{N}\to \mathrm{A}\mathrm{r}\mathrm{C}\mathrm{N}+{\mathrm{N}}_2+\mathrm{C}{\mathrm{u}}^{+}$
$\mathrm{A}\mathrm{r}\mathrm{C}\mathrm{O}\mathrm{N}{\mathrm{H}}_2\stackrel{{\mathrm{P}}_2{\mathrm{O}}_5}{\to }\mathrm{A}\mathrm{r}\mathrm{C}\mathrm{N}$
$\mathrm{A}\mathrm{r}\mathrm{C}\mathrm{O}\mathrm{N}{\mathrm{H}}_2+\mathrm{S}\mathrm{O}\mathrm{C}{\mathrm{l}}_2\to \mathrm{A}\mathrm{r}\mathrm{C}\mathrm{N}+\mathrm{S}{\mathrm{O}}_2+2\mathrm{H}\mathrm{C}\mathrm{l}$