Which one among the following is an example of oxidation reaction?

Question

Question

This question was previously asked in

NDA-II 2024 (GAT) Official Paper (Held On: 01 Sept, 2024)

Answer 1

CONCEPT:

Oxidation Reaction

An oxidation reaction involves the loss of electrons by a molecule, atom, or ion.
It often involves the addition of oxygen or the removal of hydrogen.
Oxidation reactions are a fundamental part of redox (reduction-oxidation) reactions.

EXPLANATION:

Freezing of water is a physical change and does not involve any oxidation or reduction.
- Dissolving sugar in water is a physical change and does not involve any oxidation or reduction.
- Rusting of iron is a chemical change that involves the oxidation of iron (Fe) to iron oxide (Fe₂O₃).
- Boiling of petrol is a physical change and does not involve any oxidation or reduction.
Rusting of iron is the correct example of an oxidation reaction because iron (Fe) loses electrons and forms iron oxide (Fe₂O₃).
- Fe → Fe²⁺ + 2e^-
- 4Fe + 3O₂ + 6H₂O → 4Fe(OH)₃ (rust)

Therefore, the correct option is Rusting of iron.