Question

The product formed in the below reaction is

• A.
• B.
• C.
• D.

Answer 1

Answer: (B)

Answer 2

The product formed in the given reaction is

In the above reaction, $'N '$ bears a positive charge that decreases the electron density due to its strong - I effect and hence is called a deactivating group. The overall electron density on the benzene ring decreases (inspite of three $- CH _{3}$ groups) thus, the electrophilic substitution becomes difficult. The electron density on $o$ -and $p$ -position is comparatively lesser than that at $m$ -position. So, electrophile attacks at $m$ -position i.e. substitution occur at $m$ -position.