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MCQ
In \[\ce{H2 - O2}\] fuel cell the reaction occurs at cathode is:
Options
\[\ce{O2_{(g)} + 2H2O_{(l)} + 4e^- -> 4OH^-_{( aq)}}\]
\[\ce{H^+_{( aq)} + OH^-_{( aq)} -> H2O_{(l)}}\]
\[\ce{2H2_{(g)} + O2_{(g)} -> 2H2O_{(g)}}\]
\[\ce{H^+ + e^- -> 1/2H2}\]
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Solution
\[\ce{O2_{(g)} + 2H2O_{(l)} + 4e^- -> 4OH^-_{( aq)}}\]
Concept: Thermodynamics of Cell Reactions
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