Question

Sulphur dioxide can be used as:

• A. Bleaching agent
• B. Antichlor
• C. Disinfectant
• D. None of these.

Answer 1

Answer: (A), (B), (C)

The correct options are
A

Bleaching agent

B

Antichlor

C

Disinfectant

Sulphur dioxide is used to bleach delicate substances like paper and clothes. In wineries, a mixture of $S{O}_2$, water, and citric acid is commonly used to clean and sanitize equipment. Hence it can be used as disinfectant.
Also, it is used as an antichlor to remove free (excess) and combined chlorine to chloride.