Which of These Are Oxidation-Reduction Reactions

question 51

Multiple Choice

Which of these are oxidation-reduction reactions?
I. 3H₂ + N₂ → 2NH₃
II. Cu₂O + C → 2Cu + CO
III. Fe₂O₃ + 3CO → 2Fe + CO₂
IV. 2K + Br₂ → 2KBr

• A)I only
• B)III only
• C)I and II
• D)I, II, and III
• E)all of these

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