write the reaction of SO2 with acidified KMnO4 and write the product formed.

Reaction of SO₂ with acidified KMnO₄:

Potassium permanganate has a purple colour. Sulphur dioxide is a reducing agent. Potassium permanganate is an oxidizing agent. When sulphur dioxide reacts with potassium permanganate the solution decolourizes. Color changes from Purple to transparent (Colourless).

Reason : Potassium permanganate gets reduces by sulphur dioxide.

Reaction: 2KMnO₄ + 5SO₂ + 2H₂O → 2MnSO₄ + 2KHSO₄ + H₂SO₄

Product formed: MnSO₄