In `H_2-O_2` fuel cell the reaction occurring at cathode is

Options

A. `O_(2(g))+2H_2O_((I))+4e^(-)to4OH_((aq))^(-)`
B. `H_((aq))^++OH_((aq))^(-)toH_2O_((I))`
C. `2H_(2(g))+O_(2(g))to2H_2O_((I))`
D. `H^++e^(-)to1/2H_2`

Answer

A

Explanation

The reaction occurring in `H_2-O_2` fuel cell are:
At anode: `2H_(2_(g))+4OH_(aq)^(-)to4H_2O_(I)+4e^(-)`
At cathode: `O_(2_(g))+2H_2O_(I)+4e^(-)to 4OH_(aq)^(-)`
Overall reaction : `2h_(2_(g))+O_(2_(g))to2H_2O_(I)`