Question

Bithionol is added to soaps to impart antiseptic properties. The number of –OH and –Cl groups in its structure are respectively

• A. 2, 3
• B. 3, 2
• C. 4, 2
• D. 2, 4

Hint:

Bithionol contains two phenolic rings, each contributing one –OH and two –Cl groups.

Answer 1

The Correct Option is D

Step 1: Understand the structure of Bithionol. 
Bithionol is a bisphenol compound with two aromatic rings connected via a sulfur atom. Each aromatic ring has: 
- One \(-OH\) group (phenol type) 
- Two \(-Cl\) atoms (chloro substituents) 
Step 2: Count functional groups. 
- Total \(-OH\) groups = 2 
- Total \(-Cl\) groups = 4 Hence, the correct answer is (4) 2, 4.