Which of the following would be least reactive towards bromide

Options

A. Nitrobenzene
B. Phenol
C. Anisole
D. Chlorobenzene

Answer

A

Explanation

Nitrobenzene is least reactive towards bromine because of presence of `-NO_2` group decreases electron density at o and p positions and hence attack of electrophile on the benzene nucleus is difficult because + ve charge on o and p position repel the incoming electrophile.