$4 F e + 3 O_{2} \to 2 F e_{2} O_{3}$
Which is the oxidising agent in the above reaction?

Iron

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Iron oxide

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Water

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Oxygen

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Solution

The correct option is D Oxygen
Compounds which can add oxygen, or a non-metallic compound, or remove hydrogen, or metallic element are known as oxidizing agents. When iron reacts with air, it forms iron oxide (rust). In this reaction, oxygen is added to iron, thus, iron is oxidized. Here, oxygen is oxidizing agent.

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