$H_2O_2$ is always stored in black bottles because

The dipole moment of $H_2O_2$ is more than that of $H_2O$,but $H_2O_2$ is not a good solvent because:

Hydrolysis of one mole of peroxodisulphuric acid $(H_2S_2O_8)$ yields:

Hydrolysis of one mole of peroxodi-sulphuric acid produces

Hydrogen peroxide is stored away from light because it can get decomposed when exposed to light as:

Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species. In which of the following cases $H_2O_2$ acts as a reducing agent in acidic medium?