A hydroxy compound ( X ) with molar mass 122 g ${mol}^{- 1}$ is acetylated with acetic anhydride, us

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 $290	ext{ }g{	ext{ }mol}^{- 1}$. The number of hydroxyl groups present in compound $(X)$ is :

Accepted Answer

No. of OH groups $= \frac{290 - 122}{42} = 4$

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