In which one of the following cases do both physical and chemical changes take place ?
- A. Burning of candle ✓
- B. Freezing of water
- C. Cooking of food
- D. Rusting of iron
Correct Answer: A. Burning of candle
Explanation
During the burning of a candle, the melting of wax is a physical change, while the combustion of the vaporized wax to form carbon dioxide and water is a chemical change.
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