Question

Which of the following is dihydric phenol?

• A. Resorcinol
• B. m-Cresol
• C. Phloroglucinol
• D. Pyrogallol

Hint:

Dihydric phenols contain two hydroxyl groups attached to the benzene ring. Resorcinol is an example of a dihydric phenol.

Answer 1

The Correct Option is A

Step 1: Understanding dihydric phenol.
Dihydric phenols are compounds that contain two hydroxyl groups (-OH) attached to the benzene ring. Among the options, resorcinol (1,3-dihydroxybenzene) is a dihydric phenol.

Step 2: Analyzing the options.
(A) Resorcinol: Correct — Resorcinol is a dihydric phenol, with two hydroxyl groups at positions 1 and 3 of the benzene ring.
(B) m-Cresol: m-Cresol is a monohydric phenol, containing one hydroxyl group.
(C) Phloroglucinol: Phloroglucinol contains three hydroxyl groups, making it a trihydric phenol, not dihydric.
(D) Pyrogallol: Pyrogallol also has three hydroxyl groups and is a trihydric phenol.

Step 3: Conclusion.
The correct answer is (A) Resorcinol.