A green coloured solution turns pink when ozone is bubbled through it. The pink colour further decolourises when zinc and dil. `H_2SO_4` are added to it. Identify the green and pink coloured compounds giving sequence of reactions.

Explanation

Ozone is an oxidising agent. It oxidises the green coloured solution (`K_2MnO_4`) to pink colour (`KMnO_4`).
`underset("(Green)")(2K_2MnO_4) + O_3 + H_2O rarr underset("(Pink)")(2KMnO_4)+ 2KOH + O_2`
`KMnO_4` is an oxidising agent and oxidises Zn to `ZnSO_4` and as a result its pink colour is discharged.
`5Zn + 2KMnO_4 +8H_2SO_4 rarr K_2SO_4 + 2MnSO_4 +5ZnSO_4`