Question

An aryl halide gives nucleophilic substitution reaction when:

• A. Electron withdrawing group is present at ortho or para from halogen.
• B. Electron donating group is present at ortho or para from halogen.
• C. No group is attached to it.
• D. None of the above.

Answer 1

The correct option is A Electron withdrawing group is present at ortho or para from halogen.

An aryl halide with no group attached to it does not undergo nucleophilic substitution reaction
Nucleophilic Substitution Reaction of aryl halides occurs by $S_{N}Ar$ i.e. Nucleophilic aromatic substitution reaction.
EWG must be present at ortho or para from halogen which stabilizes the intermediate formed by $-M$ effect.