← Chemistry (0620)
Q1 / 5
Hydrogen–oxygen fuel cells
Higher
1 mark
Write the overall equation for the reaction in a hydrogen-oxygen fuel cell.
A
2H2 + O2 → 2H2O
B
H2 + 2O2 → H2O2
C
2H2 + O2 → 2H + 2OH
D
H2 → 2H + electrical energy
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