CBSE 2026 · Region 1 · Set 1 · Q18 · 2 marks
Why are haloarenes less reactive towards nucleophilic substitution reaction? Give two reasons.
Marking-scheme solution
Because of,
(i)
C−X acquires partial double bond due to resonance
(ii)
sp2 hybridization of C of C−X make it more electronegative and hold the
electron pair tightly.
(iii)
repulsion between nucleophile and electron rich arenes.
(iv)
Instability of phenyl cation
Haloalkanes and HaloarenesChemical Reactions of Haloalkanes and HaloarenesUnderstandvery_short_answermedium
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CBSE Class 12 Chemistry past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.