Question

Electrophilic substitution of compound A will be fastest at position

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

Answer: (D)

$C{H}_3$ is an activity group i.e., it activates the benzene nucleus towards electrophilic substitutuion reaction at ortho-para position $Cl$, on the other hand, is a deactivating group towards electrophilic substitution. Since, the para position with respect to $Cl$ is already occupied, thus, the substitution occurs fastest at orhho $(4)$ position to $C{H}_3$