AP and TS EAMCET Engineering Model Paper 8

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Question : 142 of 160

Marks: +1, -0

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

2H2(g)+O2(g)→2H2O(l)
2Fe(s)+O2(g)+4H(aq)+→2Fe(aq)+2+2H2O(I)
Pb(s)+PbO2(s)+H2SO4(aq)→PbSO4(s)+H2O(l)
2H2O2‌(l)→2H2O‌(g)+O2‌(g)

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