Answer :

(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.


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