Hydrogen peroxide is obtained by the electrolysis of ______.

1.  water

2.  sulphuric acid

3.  hydrochloric acid

4.  fused sodium peroxide


 



Hint: Compound is dehydrating agent

Peroxodisulphate, obtained by electrolytic oxidation of acidified sulphate solutions at high current density, on hydrolysis yields hydrogen peroxide.

The reaction is as follows:

2HSO4-(aq)ElectrolysisHO3SOOSO3H(aq)Hydrolysis2HSO4-(aq)+2H+(aq)+H2O2(aq)