Question

When the gases sulphur dioxide and hydrogen sulphide mix in the presence of water, the reaction is as shown. Here, hydrogen sulphide is acting as:

$S{O}_2+2H_{2}S\to 2H_{2}O+3S$.

• A. an oxidizing agent
• B. a reducing agent
• C. a dehydrating agent
• D. a catalyst

Answer 1

Answer: (B)

a reducing agent

Here $H_{2}S$ is an reducing agent as it is getting oxidized into $H_{2}O$.