1.

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

Answer»

`Cd_((s)) + 2Ni(OH)_(3(s)) to CdO(s) + 2Ni(OH)_(2(s)) + H_2O_((l))`
`Pb_((s)) + PbO_(2(s)) + 2H_2SO_(4(aq)) to 2PbSO_(4(s)) + 2H_2O_((l))`
`2H_(2(G)) + O_(2(g)) to 2H_2O_((l))`
`2Fe_((s)) + O_(2(g)) + 4H_((aq))^(2+) + 2H_2O_((l))`

Answer :C


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