In which of the following reactions `H_2O_2` acts as a reducing agent?
`i) H_2O_2 + 2H^(+) + 2e^(-) to 2H_2O " " ii) H_2O_2 - 2e^(-) to O_2 + 2H^(+)`
`iii) H_2O_2 + 2e^(-) to 2OH^(-) " " iv) H_2O_2 + 2OH^(-) - 2e^(-) to O_2 + 2H_2O`

Options

A. a,c
B. b,d
C. a,b
D. c,d

Answer

B

Explanation

Reducing agents itself undergo oxidation (loss of electrons), hence in following two reactions, `H_2 O_2` acts as reducing agent.
` H_2 O_2 - 2e^(-) to O_2 + 2H^(+) , H_2 O_2 + 2OH^(-) - 2e^(-) to O_2 +2 H_2 O`