Ncert Exercises & Solutions

Assertion (A):	Toluene on Friedel Crafts methylation gives o- and p- xylene.
Reason (R):	$C H_{3}$ -group bonded to benzene ring increases electron density at o- and p- position.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True and (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	(A) is False but (R) is True.

Hint: CH₃ group is an electron-donating group

Toluene has -CH₃ group attached to benzene. -CH₃ group activates the benzene for the attack of an electrophile.

In the resonating structure of toluene, electronic density is more on ortho and para position.

Hence, substitution takes place mainly at these positions. Thus, both assertion and reason are true and the reason is the correct explanation of assertion.

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions