A hydroxy compound (X) with molar mass 122 g mol –1 is acetylated with acetic anhydride, using a large excess of the reagent ensuring complete acetylation of all hydroxyl groups. The product obtained

Question

A hydroxy compound (X) with molar mass 122 g mol –1 is acetylated with acetic anhydride, using a large excess of the reagent ensuring complete acetylation of all hydroxyl groups. The product obtained has a molar mass of 290 g mol –1. The number of hydroxyl groups present in compound (X) is :

(A) 3
(B) 5
(C) 2
(D) 4

Prashant Kotian · Accepted Answer

Correct answer: D. OH OH OH OH O O O Excess O O O C–CH3 O C–CH3 O C–CH3 O O C–CH3 O M =290 M =122 No. of OH groups = 290 122 42  

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