Question

The correct order of reactivity in electrophilic substitution reaction of the following compounds is

1. B > C > A > D 

2. D > C > B > A 

3. A > B > C > D 

4. B > A > C > D

Answer 1

4. B > A > C > D

\(-CH _3\) shows + M and + I.

\(-Cl\) shows +M and -I but inductive effect dominates.

\(-NO_2\) shows -M and -I.

Electrophilic substitution \(\alpha \frac {1}{-M\,and\,-I}\)

\(\alpha +M \,and \, +I\)

Hence, order is \(B>A >C>D.\)