Question

In the given equation - \[\ce{H2S + H2SO4 → S + 2H2O + SO2}\]:

Identify the role played by conc. H₂SO₄.

पर्याय

• Non-volatile acid

• Oxidising agent

• Dehydrating agent

• None of the above

Answer 1

Oxidising agent

Explanation:

Concentrated sulphuric acid oxidises hydrogen sulphide (H₂S) to sulphur, while it itself gets reduced to sulphur dioxide (SO₂).

\[\ce{H2S + H2SO4 -> S + 2H2O + SO2}\]

Hence, concentrated H₂SO₄ acts as an oxidising agent.