In `H_(2) - O_(2)` fuel cell the reaction occuring at cathode is

Options

A. `2 H_(2) + O_(2) to 2 H_(2) (l)`
B. `H^(+) + OH^(-) to H_(2)O`
C. `O_(2) + 2 H_(2)O + 4e^(-) to 4OH^(-)`
D. `H^(+) + e^(-) to (1//2) H_(2)`

Answer

C

Explanation

In `H_(2) - O_(2)` fuel cell , the reaction at cathode is `O_(2) + 2 H_(2)O + 4 e^(-) to 4 OH^(-)` .