4. The equation 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O is an oxidation-reduction reaction. Which statement is true?
(A) the carbon is reduced, and the oxygen is oxidized
(B) the carbon is oxidized, and the hydrogen is reduced
(C) the carbon is oxidized, and the oxygen is reduced
(D) it is a decomposition reaction

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一、本題在考什麼觀念 氧化還原反應的判...
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