Which of the following reaction shows metal corrosion reaction in presence of `H_(3)O^(+)` ?

Options

A. `2H_(2)O_((l)) to O_(2(g)) +4H_((aq))^(+)+4e^(-)`
B. `2H_(2)O_((l))+2e^(-) to H_(2(g))+2OH_((aq))^(-)`
C. `O_(2(g))+4H_((aq))^(+)+4e^(-) to 2H_(2)O_((l))`
D. `O_(2(g))+2H_(2)O_((l))+4e^(-) to 4OH_((aq))^(-)`

Answer

C

Explanation

Reduction reaction is carried out on cathode. Only reaction of (C) shows reduction reaction in presence of `H^(+)(H_(3)O^(+))`.