Which one of the following processes involves chemical reaction?
- A. Evaporation of petrol
- B. Dissolution of salt in water
- C. Storing of oxygen gas under pressure in a gas cylinder
- D. Burning of magnesium ribbon in air ✓
Correct Answer: D. Burning of magnesium ribbon in air
Explanation
Burning of a magnesium ribbon is a chemical change because a new substance, magnesium oxide, is formed.
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