Question

Which of the following is used as disinfectant?

• A. Bithional
• B. Novestrol
• C. Sulphur dioxide
• D. Chloroxylenol

Hint:

Disinfectants are used on non-living objects, while antiseptics are applied to living tissues.

Answer 1

The Correct Option is C

Step 1: Meaning of disinfectant.
Disinfectants are chemical substances used to destroy microorganisms on non-living surfaces like floors, drains, and water.

Step 2: Role of sulphur dioxide.
Sulphur dioxide is widely used as a disinfectant and preservative due to its strong antimicrobial properties.

Step 3: Analysis of other options.
Bithional and Novestrol are antiseptics.
Chloroxylenol is commonly used as an antiseptic (e.g., Dettol).

Step 4: Conclusion.
Sulphur dioxide is used as a disinfectant.