Identify oxidation-reduction in the following reaction:

(i) C + O₂→ CO₂

(ii) Mg + CI₂→ MgCI₂

(iii) ZnO + C → Zn + CO

(iv) Fe₂O₃ + 3CO → 2Fe + 3CO₂

(i) C + O₂→ CO₂

The above reaction is an oxidation reaction in which the carbon atom is gaining the oxygen and is oxidized.

(ii) Mg + CI₂→ MgCI₂

The above reaction is an oxidation reaction because here a more electronegative atom which is chlorine is being added to magnesium.

(iii) ZnO + C → Zn + CO

The above reaction is a redox reaction in which zinc is getting reduced as it is losing oxygen atoms and carbon is getting oxidized as it is gaining the oxygen atoms.

(iv) Fe₂O₃ + 3CO → 2Fe + 3CO₂

The above reaction is a redox reaction in which ferric oxide (Fe₂O₃) is reduced into iron (Fe) and carbon monoxide (CO) is oxidized into carbon dioxide (CO₂) by gaining the oxygen atoms.