A polyhydroxy alcohol having molecular weight = 168, on acetylation the molecular weight increases to 294, the number of

Engineering

Chemistry

Chemical Reactions of Alcohols

Question

A polyhydroxy alcohol having molecular weight = 168, on acetylation the molecular weight increases to 294, the number of –OH groups present in the alcohol is X?

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Change in molecular weight = 294 –168 ⇒ 126

       On acetylation
       so, No. of –OH groups $= \frac{126 + 3}{43} \Rightarrow 3$
       Hence X = 3