Which of the following reaction is reaction is used to make a fuel cell .

Options

A. `Cd_(s)+2Ni(OH)_(3(s)) to CdO_(s) + 2Ni(OH)_(2(s)) + H_2O_(l)`
B. `Pb_(s) + PbO_(2(s)) + 2H_2SO_(4(aq)) to 2PbSO_(4(s)) + 2H_2O_(l)`
C. `2H_(2(g)) + O_(2(g)) to 2H_2O_(l)`
D. `2Fe(s) + O_(2(g)) + 4H_(aq)^(+) to 2Fe_(aq)^(2+) + 2H_2O_(l)`

Answer

C

Explanation

Fuel cells are galvanic cells in which chemical energy of fuel is directly converted into electrical energy.
e.g., Hydrogen - oxygen fuel cell.