KEAM 2014 Physics and Chemistry Paper

Ozone oxidises PbS to PbSO4 and NO to NO2.
NO(g)+O3(g)⟶NO2(g)+O2(g)
It oxidises aqueous KI at pH9.2 and acts as oxidising agent in the manufacture of KMnO4. It is a resonance hybrid of following two structures. That's why the two oxygen-oxgyen bond lengths in this molecule are identical.