Question

The common name of Benzene-1,2-diol is

• A. Catechol
• B. Resorcinol
• C. Quinol
• D. Pyrogallol

Hint:

Ortho = Catechol, Meta = Resorcinol, Para = Quinol.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
The question asks for the common nomenclature of dihydroxybenzene isomers.

Step 3: Detailed Explanation:
Dihydroxybenzenes have common names based on the relative position of the hydroxyl groups:
1. ortho-isomer (1,2-diol): Catechol.
2. meta-isomer (1,3-diol): Resorcinol.
3. para-isomer (1,4-diol): Quinol (or Hydroquinone).
Pyrogallol is benzene-1,2,3-triol.

Step 4: Final Answer:
Benzene-1,2-diol is commonly known as Catechol.