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In the thermite reaction Fe₂O₃ + 2Al → Al₂O₃ + 2Fe, which statement correctly identifies oxidation and reduction?

Answer and explanation

Correct answer: Aluminium is oxidised and Fe₂O₃ is reduced.

In Al, the oxidation number is 0, while in Al₂O₃ it becomes +3; aluminium loses electrons and is oxidised. Iron in Fe₂O₃ has oxidation number +3 and changes to elemental iron with oxidation number 0, so it gains electrons and is reduced. This is a redox reaction in which aluminium acts as the reducing agent and iron(III) oxide as the oxidising agent. Therefore option A is correct.

Related tags

ScienceClass 10Redox ReactionThermite ReactionOxidation NumberChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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