Q.Hydrogen peroxide can act both as an oxidizing agent and as a reducing agent. Illustrate each behaviour with one balanced ionic equation.

Hydrogen Peroxide

Hydrogen peroxide $\text{H}_2\text{O}_2$ is a pale-blue, syrupy liquid that is miscible with water in all proportions (not immiscible) and has a non-planar open-book structure.

Redox behaviour: the oxygen is in the –1 state, so $\text{H}_2\text{O}_2$ can act as both an oxidising and a reducing agent in acidic and basic media. With acidified $\text{K}_2\text{Cr}_2\text{O}_7$ it gives blue chromium peroxide $\text{CrO}_5$ (or $\text{CrO(O}_2)_2$), which is extracted into the ethereal layer as a blue colour — a classic test. …