Sulfur dioxide acts as an oxidising agent as well as a reducing agent. Give one reaction each to show its oxidising nature and its reducing nature.

Explanation

The oxidation state of S `SO_(2)` is `+4` which is an intermediate and may increase or decrease. Hence, `SO_(2)` can act both as `+4` which is an intermediate oxidising and reducing agent.
Example of oxidising agent : `3Fe+SO_(2) to 2FeO+FeS`
Example of reducing agent : `SO_(2)+I_(2)+2H_(2)O to H_(2)SO_(4)+2HI`