Question

Arrange in order of decreasing trend towards electrophilic substitution reactions: Chlorobenzene (I), Benzene (II), toluene (III) anilinium chloride (IV)

• A. III> II > I > IV
• B. IV > I > II > III
• C. II > I > IV > III
• D. I > II > IV > III

Answer 1

The correct option is A III> II > I > IV

Reactivity towards electrophilic substitution reaction depends upon stability of arenium ion intermediate. Stability of arenium ion increases in the presence of EDG group (causing +R, +I, H) and decreases in the presence of EWG (causing -R, -I). So, the correct order will be III> II > I > IV