Question

What is the IUPAC name of hydroquinone?

• A. Benzene-1, 4-diol
• B. Benzene-1, 3, 5-triol
• C. Benzene-1, 2-diol
• D. Benzene-1, 2, 4-triol

Hint:

In IUPAC naming, the positions of functional groups on a benzene ring are crucial. Hydroquinone has hydroxyl groups at the 1st and 4th positions, hence the name "Benzene-1, 4-diol."

Answer 1

The Correct Option is A

Step 1: Structure of hydroquinone.
Hydroquinone, also known as 1,4-dihydroxybenzene, is a compound where two hydroxyl groups (-OH) are attached to the benzene ring at the 1st and 4th positions.

Step 2: Analyzing the options.
(A) Benzene-1, 4-diol: Correct — This is the IUPAC name for hydroquinone, indicating the positions of the hydroxyl groups on the benzene ring.
(B) Benzene-1, 3, 5-triol: This is incorrect. It represents a compound where hydroxyl groups are attached at the 1st, 3rd, and 5th positions, not the 1st and 4th.
(C) Benzene-1, 2-diol: This is incorrect. It represents catechol, where hydroxyl groups are at the 1st and 2nd positions.
(D) Benzene-1, 2, 4-triol: This is incorrect. It represents a compound with three hydroxyl groups attached at the 1st, 2nd, and 4th positions.

Step 3: Conclusion.
The correct IUPAC name for hydroquinone is (A) Benzene-1, 4-diol.