Which best identifies why the rusting of an iron nail in the presence of water and oxygen is an oxidation-reduction reaction

In redox reactions, the electrons are transferred.

Explanation:

Redox reaction is defined as the reaction in which oxidation and reduction reaction occur simultaneously.

Oxidation reaction is defined as the chemical reaction in which an atom looses its electrons. The oxidation number of the atom gets increased during this reaction.

Reduction reaction is defined as the chemical reaction in which an atom gains electrons. The oxidation number of the atom gets reduced during this reaction.

Electrons are transferred from one atom to another in this type of reaction.

The chemical reaction for rusting of iron follows the equation:

Oxidation half reaction:  

Reduction half reaction:  

From the above reactions, the electrons get transferred from iron to oxygen. Thus, it is an redox reaction.

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