Practice question

MCQ

Question

Which reaction demonstrates reduction by the removal of oxygen from a metal oxide without hydrogen involvement?

Choose one · Correct answer highlighted

PbO₂ + C → Pb + CO₂ Correct Fe₂O₃ + 3H₂ → 2Fe + 3H₂O CuO + H₂ → Cu + H₂O 2H₂O₂ → 2H₂O + O₂

In PbO₂ + C → Pb + CO₂, Pb (+4 in PbO₂) loses oxygen to become 0, reduced by C (0 to +4), no hydrogen present.

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