A student has planned to prepare acetanilide from aniline using acetic anhydride. The student has started from 9.3g of aniline. However, the student has managed to obtain 11 g of dry acetanilide. The

Question

A student has planned to prepare acetanilide from aniline using acetic anhydride. The student has started from 9.3g of aniline. However, the student has managed to obtain 11 g of dry acetanilide. The % yield of this reaction is :-

(A) 81.5%
(B) 97.5%
(C) 59.5%
(D) 72.5%

Prashant Kotian · Accepted Answer

Correct answer: A. NH2 9.3 gm Ac2O NH–C–CH3 11 gm O MW = 93 MW = 135 9.3 n 0.1   n 0.08148   % yield =   0.08148 100 81.5% 0.1

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