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) + H_(2)O(l)`
B. `Pb(s) + PbO_(2)(s) + 2H_(2)SO_(4)(aq) to 2PbSO_(4)(s) + 2H_(2)O(l)`
C. `2H_(2)(g) + O_(2)(g) to 2H_(2)O(l)`
D. `2Fe_(s) + O_(2)(g) + 4H^(+)(aq) to 2Fe^(2+)(aq) + 2H_(2)O(l)`

Answer

C

Explanation

Properties of ionic solid