Hydrogen peroxide can be prepared by the action of dil. `H_(2)SO_(4)` or `H_(3)PO_(4)` on barium peroxide or by bubbling carbon dioxide through a thin paste of barium peroxide. On an industrial scale , it can be prepared by hydrolysis of peroxodisulphuric acid obtained by electrolysis of 50% `H_(2)SO_(4)` or an equimolar mixture of `H_(2)SO_(4)` and ammonium sulphate .The strength of `H_(2)O_(2)` solution can be expressed in a number ways namely normality , molarity , percentage strength and volume of `O_(2)` produced at N.T.P by decomposition of 1 mL of `H_(2)O_(2)` acts as an oxidising as well a reducing agent both in acidic and basic media.
Hydrogen peroxide is used as

Options

A. An oxidant only
B. A reductant only
C. An acid only
D. An oxidant , a reductant and an acid

Answer

D