Question

Why does ozone act as a powerful oxidising agent?

Answer 1

Ozone decomposes to liberate nascent oxygen, hence it is a powerful oxidising agent.

O_3(g) → O_2(g) + O

For example :

It oxidises lead sulphide (PbS) to lead sulphate (PbSO₄).

Potassium iodide, KI is oxidised to iodine, I₂ in the solution.