Question

Which one among the following is most reactive towards electrophilic substitution reaction?

• A. Aniline
• B. Nitrobenzene
• C. Benzoicacid
• D. Acetanilide

Answer 1

Answer: (B)

Nitrobenzene

Answer 2

The activating substituents make the benzene ring more reactive towards electrophilic substitution reaction while the deactivating substituents make the benzene ring less reactive towards electrophilic substitution reaction. $-NH_2$ group is the most activating group which is present in aniline $(C_{6}H_{5}-NH_{2})$ hence it is the most reactive towards electrophilic substitution reaction.