Chemistry - Halogen Derivative Question with Solution | TestHub

(A) $\to$ (Q): Reactivity towards nucleophilic aromatic substitution ($S_{N}Ar$) increases with electron-withdrawing groups (II > I > III).

(B) $\to$ (R): Reactivity towards electrophilic aromatic substitution ($S_{E}Ar$) increases with more electron-donating methyl groups (III > II > I).

(C) $\to$ (P): Reactivity towards nucleophilic addition at the carbonyl carbon follows the order I > II > III due to electronic effects.

(D) $\to$ (S): Basic strength follows III > I > II, as the lone pair on nitrogen in III is localized, while in I it is delocalized, and II lacks a basic nitrogen.