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Chemistry · Alcohols, Ethers and Phenols

JEE Main 2026 — 24 January, Morning Shift — Question 58

A hydroxy compound ( X ) with molar mass 122 g mol−1\mathrm{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−1290 \mathrm{~g} \mathrm{~mol}^{-1}. The number of hydroxyl groups present in compound (X)(\mathrm{X}) is :

  1. Option A:

    3

  2. Option B:

    5

  3. Option C:

    2

  4. Option D:

    4

    Correct

Answer: D

Step-by-step solution

No. of OH groups =290−12242=4=\frac{290-122}{42}=4

Solution figure

Answer key and solution verified before publishing.

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Exam
JEE Main 2026
Paper
24 January, Morning Shift
Subject
Chemistry
Chapter
Alcohols, Ethers and Phenols
Topic
Chemical properties of alcohols
A hydroxy compound ( X ) with molar mass 122 g mol -1 is acetylated… | JEE Main 2026 PYQ with Solution · DhiX AI