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Question:

Polysubstitution is a major drawback in:

Friedel Craft's alkylation

Friedel Craft's acylation

Reimer Tiemann reaction

Acetylation of aniline

Solution:

Correct option is C. Friedel Craft's alkylation
Solution:- (C) Friedel Craft's alkylation
In Friedal crafts alkylation product obtained is more activated and hence polysubtitution will take place.