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NDA 2 2024 GAT, question 116

Topic: Chemistry

Q116

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

  1. (a) Freezing of water
  2. (b) Dissolving sugar in water
  3. (c) Rusting of ironCorrect answer
  4. (d) Boiling of petrol

Solution.

Answer: (c) Rusting of iron

  1. Rusting involves oxidation of iron in the presence of water and oxygen.
  2. The products are hydrated iron oxides; this is a chemical change, not merely a physical coating.