Chemistry · Alcohols, Ethers and Phenols

JEE Main 2024 — 27 January, Shift 2 — Question 63

Phenolic group can be identified by a positive:

Option A:
Phthalein dye test
Correct
Option B:
Lucas test
Option C:
Tollen's test
Option D:
Carbylamine test

Answer: A

Step-by-step solution

Phenols give a positive phthalein dye test by reacting with phthalic anhydride in the presence of concentrated $\text{H}_2\text{SO}_4$ to form phenolphthalein, which shows characteristic color.

The other tests in the options are used for different functional groups:

Lucas test is used to distinguish primary, secondary, and tertiary alcohols.
Tollen's test is used to detect aldehydes.
Carbylamine test is used to detect primary amines.

Thus, the correct answer is A.

Answer key and solution verified before publishing.

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Exam: JEE Main 2024
Paper: 27 January, Shift 2
Subject: Chemistry
Chapter: Alcohols, Ethers and Phenols
Topic: Phenols

Answer: A

Step-by-step solution

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