In which of the following reaction `H_(2)O_(2)` acts as a reducing agents?
`A.H_(2)O_(2)+2H^(o+)+2e^(-)to2H_(2)O`
`B. H_(2)O_(2)-2e^(-2)toO_(2)+2H^(o+)`
`C. H_(2)O_(2)+2e^(-)to2OH^(ɵ)`
D. `H_(2)O_(2)+2OH^(ɵ)-3e^(-)toO_(2)+2H_(2)O`

Options

A. ` 1.2`
B. ` 3,4`
C. ` 1,3`
D. ` 2,4`

Answer

D

Explanation

The reducing agent oxidised itself by undergoing oxdation through the loss of electrons. Thus, reducing agent reduces othe molecules by supplying electrons to them.
(1) `H_2O_2^(-1) - +1H^+ 2E^-rarr 2H_2O^(-2)`
In this reaction, `H_2O_2` undergoes reduction as `O` shows increase in oxidation number.Thus, `H_2O_2` acts as a reducing agent.
(3) `H_2O_2^(-1) -2e^(-) rarr 2OH^-`
In this reaction, `H_2O_2` undergoes reduction
(4) `H_2O_2^1 -2OH^- -2e rarrO_2^0+2 H_2O`
In this reaction, `H_2O_2` undergoes reduction. Thus, acts as a reducing agent .