The correct order of the following compounds | vedclass

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(A) Nucleophilic aromatic substitution reactions are facilitated by the presence of electron-withdrawing groups (like $-NO_2$) on the benzene ring. Th

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$ ( i ) < ( ii ) < ( iii ) < ( iv ) $

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(A) Nucleophilic aromatic substitution reactions are facilitated by the presence of electron-withdrawing groups (like $-NO_2$) on the benzene ring. These groups stabilize the intermediate carbanion through the $-I$ and $-M$ effects. As the number of $-NO_2$ groups increases,the electron density on the ring decreases,making it more susceptible to nucleophilic attack. The order of reactivity is: $(i)$ Chlorobenzene (no $-NO_2$ group) (ii) $p$-Nitrochlorobenzene (one $-NO_2$ group) (iii) $2,4$-Dinitrochlorobenzene (two $-NO_2$ groups) (iv) $2,4,6$-Trinitrochlorobenzene (three $-NO_2$ groups) Therefore,the increasing order of tendency towards nucleophilic substitution is $(i) < (ii) < (iii) < (iv)$.

The correct order of the following compounds showing increasing tendency towards nucleophilic substitution reaction is :-
$(i)$ Chlorobenzene
(ii) $p$-Nitrochlorobenzene
(iii) $2,4$-Dinitrochlorobenzene
(iv) $2,4,6$-Trinitrochlorobenzene

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The correct order of the following compounds showing increasing tendency towards nucleophilic substitution reaction is :- $(i)$ Chlorobenzene (ii) $p$-Nitrochlorobenzene (iii) $2,4$-Dinitrochlorobenzene (iv) $2,4,6$-Trinitrochlorobenzene