Question

The common name of Benzene-1,4-diol is

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

Hint:

1,2 = Catechol; 1,3 = Resorcinol; 1,4 = Quinol.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Dihydric phenols have specific common names based on the relative positioning of the two hydroxyl groups on the benzene ring.
Step 2: Key Formula or Approach:
- Ortho (\(1,2\)) isomer
- Meta (\(1,3\)) isomer
- Para (\(1,4\)) isomer
Step 3: Detailed Explanation:
- Benzene-1,2-diol is Catechol.
- Benzene-1,3-diol is Resorcinol.
- Benzene-1,4-diol is Quinol (also known as Hydroquinone).
- Pyrogallol is a trihydroxy benzene (\(1,2,3\)-isomer).
Step 4: Final Answer:
Benzene-1,4-diol is commonly known as Quinol.