Question

What is the IUPAC name of hydroquinone?

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

Hint:

When naming diols, the position of the hydroxyl groups on the benzene ring determines the IUPAC name. Hydroquinone has -OH groups at positions 1 and 2.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
Hydroquinone is a common name for an aromatic organic compound that consists of a benzene ring substituted with two hydroxyl groups.
Step 2: Detailed Explanation:
The molecular formula of hydroquinone is \( \text{C}_6\text{H}_4(\text{OH})_2 \).
According to IUPAC nomenclature, the parent chain is the benzene ring.
The two hydroxyl (\(-\text{OH}\)) groups are positioned directly opposite to each other on the benzene ring.
This corresponds to the 1st and 4th positions of the carbon atoms in the ring.
Therefore, the correct IUPAC name is Benzene-1,4-diol.
Step 3: Final Answer:
The IUPAC name is Benzene-1,4-diol.