Which of These Is a Possible Cathodic Reaction That  Occurs

question 46

Multiple Choice

Which of these is a possible cathodic reaction that  occurs during the corrosion of iron?

• A) 2Fe(s) → 2Fe²⁺(aq) + 4e ⁻
• B) 2H⁺(aq) + 2e ⁻ → H₂(g)
• C) 2H₂O(l) + 2e ⁻ → H₂(g) + 2OH ⁻ (aq)
• D) O₂(g) + 2H₂O(l) + 4e ⁻ → 4OH ⁻ (aq)
• E) SO₂(g) + O₂(g) + 2e ⁻ → SO₄^{2 −} (aq)

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