Question

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

• A. $B > C > A > D$
• B. $D > C > B > A$
• C. $A > B > C > D$
• D. $B > A > C > D$

Answer 1

The Correct Option is D

The effect of substituents on electrophilic substitution reactions is as follows:

• $-\text{CH}_3$ shows $+M$ and $+I$.
• $-\text{Cl}$ shows $+M$ and $-I$ but inductive effect dominates.
• $-\text{NO}_2$ shows $-M$ and $-I$.

Electrophilic substitution order is based on $\alpha + M$ and $+I$, with the highest reactivity for the methyl group. Hence, order is $B > A > C > D$.