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 ofelectrons), hence in following two reactions `H_2O_2` acts as reducing agent.
`H_2O_2 - 2e^(-) to O_2 + 2H^(+) , H_2O_2 + 2OH^(-) - 2e^(-) to O_2 + 2H_2O`