Discussion Forum

Which of the following oxides can act both as an oxidising agent as well as a reducing agent?

Answer:

Explanation:

$SO_{2}$ oxides can act both as an oxidising agent as well as a reducing agent. It behaves as a reducing agent in moist conditions. It converts iron (III) ions to iron (II) ions and decolourises acidified potassium permanganate(VII) solution.

$2 Fe^{3+}+ SO_{2}+2H_{2}O\rightarrow2Fe^{2+}+SO_{4}^{2-}+4H^{+}$

 when SO₂ reacts with H₂S, it produces sulphur and water. In this reaction, 'SO₂' act as an oxidising agent.