Q. Acetylation of aniline with acetic anhydride in presence of pyridine yields acetic acid and product .
How many of the below given groups present in the compound ?

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Answer: 3

Solution:

Acetylation of aniline with acetic anhydride in presence of pyridine yields acetanilide and acetic acid.
Solution
Among the given groups, - and - are present in acetanilide.