Practice question

MCQ

Question

Which of the following is a combination reaction that is also a redox reaction?

Options

Choose one · Correct answer highlighted

C + O₂ → CO₂ Correct CaO + CO₂ → CaCO₃ NH₃ + HCl → NH₄Cl NaCl + AgNO₃ → AgCl + NaNO₃

Explanation

In C + O₂ → CO₂, C (0) is oxidized to +4, and O₂ (0) is reduced to -2, making it a redox combination reaction.

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