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Solution


Q.

Identify correct statement/s                   [2025]

(A) –OCH3 and –NHCOCH3 are activating group.

(B) –CN and –OH are meta directing group.

(C) –CN and –SO3H are meta directing group.

(D) Activating groups act as ortho- and para directing groups.

(E) Halides are activating groups.

Choose the correct answer from the options given below:
1 (A), (B) and (E) only  
2 (A), (C) and (D) only  
3 (A) only  
4 (A) and (C) only  

Ans.

(2)

(A) For –OCH3 and –NHCOCH3, +M effect is more than –I effect, hence these are activating groups.

(B)(C) –CN and –SO3H are –M groups. –M groups decrease electron density at ortho and para position hence are meta directing for electrophilic substitution reactions. –OH is a +M group. +M groups increase electron density at ortho and para positions, hence are ortho and para directing for electrophilic substitution reactions.

(D) Activating groups are +M groups. +M are ortho and para directing for electrophilic substitution reactions.

(E) For halides –I > +M, hence these are deactivating groups.