Question

A solution of sulphur dioxide in water reacts with $H_{2}S$ precipitating sulphur. Here sulphur dioxide acts as.

• A. An oxidising agent
• B. A reducing agent
• C. An acid
• D. A catalyst

Answer 1

Answer: (A)

An oxidising agent

Answer 2

$\underset{\text{reducing agent}}{2H_{2}S} + \underset{\text{oxidising agent}}{SO_{2}} \rightarrow 2H_{2}O + 3S$