Practice question

MCQ

Question

Which of the following is a decomposition redox reaction?

Choose one · Correct answer highlighted

CaCO₃ → CaO + CO₂ 2NaCl → 2Na + Cl₂ KClO₃ → KCl + O₂ 2HgO → 2Hg + O₂ Correct

In 2HgO → 2Hg + O₂, Hg (+2 to 0) is reduced, and O (-2 to 0) is oxidized.

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