Question

In a $H_2-O_2$ fuel cell, combustion of hydrogen occurs to:

• A. remove adsorbed oxygen from electrode surface
• B. create potential difference between the two electrodes
• C. produce high purity water
• D. generate heat

Answer 1

The correct option is B create potential difference between the two electrodes

Combustion of hydrogen occur in $H_2-O_2$ fuel cell because of difference in potential between two electrode. So on one electrode oxidation occur while on another reduction.