What are fuel cells ? Write the electrode reactions of a fuel cell which uses the reaction of hydrogen with oxygen.

Explanation

Those cells in which decimal energy of fuel is converted into electrical energy are called fuel cells.
Electrode reactions
`{:("At anode", H_(2)(g) + 2OH^(-) (aq) to 2H_(2)O (l) + 2e^(-) xx 2),("At cathode", O_(2)(g) + 2H_(2)O(l) + 4e^(-) to 4OH^(-) (aq)),("Net cell reaction", 2H_(2) (g) + O_(2) (g) to 2H_(2)O(l)):}`