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(C) Nucleophilic aromatic substitution $(ArS_{N}2)$ is facilitated by the presence of electron-withdrawing groups $(EWG)$ on the benzene ring.These gr

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$I > III > II$

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(C) Nucleophilic aromatic substitution $(ArS_{N}2)$ is facilitated by the presence of electron-withdrawing groups $(EWG)$ on the benzene ring.These groups stabilize the carbanion intermediate formed during the reaction.The $-NO_2$ group exerts both $-I$ (inductive) and $-R$ (resonance) effects.At the ortho position $(I)$,the $-NO_2$ group exerts both $-I$ and $-R$ effects,which strongly stabilize the intermediate.At the meta position $(III)$,the $-NO_2$ group exerts only the $-I$ effect,which provides less stabilization compared to the combined $-I$ and $-R$ effects.Chlorobenzene $(II)$ has no electron-withdrawing group,making it the least reactive.Therefore,the order of reactivity is $I > III > II$.

Arrange the following in the correct order of reactivity towards nucleophilic substitution reaction.
$I$. $1-$chloro$-2-$nitrobenzene
$II$. Chlorobenzene
$III$. $1-$chloro$-3-$nitrobenzene

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Arrange the following in the correct order of reactivity towards nucleophilic substitution reaction.$I$. $1-$chloro$-2-$nitrobenzene$II$. Chlorobenzene$III$. $1-$chloro$-3-$nitrobenzene