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Chemistry · May / June 2025 · Paper 12 · Question 16

5070Physical and chemical changes

Which process is a chemical change?

  1. Athe distillation of aqueous ethanol
  2. Bthe evaporation of water from aqueous sodium chloride
  3. Cthe melting of wax
  4. Dthe rusting of iron

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Correct answer: D. the rusting of iron

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