Hydrogen peroxide is a powerful oxidising agent, both in the acidic and alkaline medium.
In acidic medium: `H_(2)O_(2)+2H^(o+)+2e^(ɵ)to2H_(2)O`
In alkaline medium: `H_(2)O_(2)+2e^(ɵ)to2overset(Theta)(O)H`
Hydrogen peroxide acts as a reducing agent towards powerful oxidising agents.
In acidic medium: `H_(2)O_(2)to2H^(o+)+O_(2)+2e^(ɵ)` In alkaline medium, however, its reducing nature is more effective.
`H_(2)O_(2)to2H^(o+)+O_(2)+2e^(ɵ)`
In which of the following reactions, `H_2O_2` acts as an oxidising agent?

Options

A. `2I^(ɵ)+H_(2)O_(2)+2H^(o+)toI_(2)+2H_(2)O`
B. `IO_(4)^(ɵ)+H_(2)O_(2)toIO_(3)^(ɵ)+H_(2)O+O_(2)`
C. `Ag_(2)O+H_(2)O_(2)to2Ag+H_(2)O+O_(2)`
D. `2MnO_(4)^(ɵ)+6H^(o+)+5H_(2)O_(2)to2Mn^(2+)+8H_(2)O+5O_(3)`

Answer

A

Explanation

`I^(ɵ)toI_(2)`, hence`H_(2)O_(2)` acts as an oxidisng agent.