ElectrochemistryHard

Question

In  H2 - O2  fuel cell the reaction occuring at cathode is  :

Options

A. 2 H2O + O2 + 4 e- →  4OH-
B.2 H2 + O2 →   2 H2O (l)
C.H+ + OH- → H2O
D. H+ + e- → H2 .

Solution

H2 - O2 fuel cell
At anode : 2OH- + H2 →  2H2O + 2e-
At cathode : 2 H2O + O2 + 4e- → 4OH-

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