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Shown Below Are the Reactions Occurring in the Proton-Exchange Membrane

Question 119

Multiple Choice

Shown below are the reactions occurring in the proton-exchange membrane (PEM) fuel cell. I.2 H2(g) → 4 H+(aq) + 4 e-
II.O2(g) + 4 H+(aq) + 4 e- → 2 H2O(l)
Overall 2 H2(g) + O2(g) → 2 H2O(l)
Which is the cathode reaction,and what is being oxidized in the overall reaction?


A) I,H2
B) I,O2
C) II,H2
D) II,O2

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