Which of the following reactions is used...

Which of the following reactions is used to make a fuel cell ?

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_((aq))^(+)+2H_(2)O_((l))`

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The correct Answer is:

C

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