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: Understand hydroquinone.
Hydroquinone is a benzene ring with two hydroxyl groups (-OH) attached to the 1st and 2nd positions. The hydroxyl groups are positioned ortho to each other, hence the name "Benzene-1,2-diol".

Step 2: Verify other options.
- Benzene-1,3-diol corresponds to resorcinol, which has hydroxyl groups at the 1st and 3rd positions.
- Benzene-1,4-diol corresponds to quinol.
- Benzene-1,3,5-triol corresponds to phloroglucinol.

Step 3: Identify the correct IUPAC name.
The IUPAC name of hydroquinone is Benzene-1,2-diol, so the correct answer is option \((1)\).

Step 4: Final answer.
\[ \boxed{\text{Benzene-1,2-diol}} \] which matches option \((1)\).