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Question:

Correct order of electrophilic substitution reaction is?

d>b>a>c

a>b>c>d

b>a>c>d

b>a>d>c

Solution:

Correct option is C. b>a>c>d
Solution:- (C)b>a>c>d
−OCH3 and −CH3 is an activating group because of their +R and +I effect which favours electrophilic substitution on benzene ring and −Cl and −CHO are deactivating due to their −I and −M effect. Hence the order of electrophilic substitution reaction are-b>a>c>d