In which of the following reactions does $O_{2}$ acts as an oxidant?

3 O_{2} ⟶ 2 O_{3}

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2 F_{2} + O_{2} ⟶ 2 F_{2} O

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N_{2} + O_{2} ⟶ 2 N O

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C + O_{2} ⟶ C O_{2}

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Solution

The correct options are
A $N_{2} + O_{2} ⟶ 2 N O$
D $C + O_{2} ⟶ C O_{2}$
Oxidation is the loss of electrons or an increase in oxidation state by a molecule, atom, or ion.
A substance that oxidizes another substance is an oxidizing agent or oxidant.
$N_{2} + O_{2} \to 2 N O$
$C + O_{2} \to C O_{2}$
In the above reactions, $O_{2}$ caused the oxidation. So, $O_{2}$ is an oxidant.
Hence, options C and D are correct options.

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