Which Pair of Half-Reactions Takes Place in a Fuel Cell $\rightarrow$

question 35

Multiple Choice

Which pair of half-reactions takes place in a fuel cell?

• A) reduction: O₂ + 4 H⁺ + 4 e^- \(\rightarrow\)2H₂O; oxidation: H₂ \(\rightarrow\)2 H⁺ + 2 e^-
• B) reduction: H₂ \(\rightarrow\)2 H⁺ + 2 e^-; oxidation: O₂ + 4 H⁺ + 4 e^- \(\rightarrow\)2 H₂O
• C) reduction: O₂ + 4 H⁺ + 4 e^- \(\rightarrow\)2H₂O; oxidation: 2 H⁺ + 2 e^- \(\rightarrow\)H₂
• D) reduction: H₂ \(\rightarrow\)2 H⁺ + 2 e^-; oxidation: 2 H₂O \(\rightarrow\)O₂ + 4H⁺ + 4 e^-

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