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Which one of the following processes involves chemical reaction ?

Options

  1. AEvaporation of petrol
  2. BDissolution of salt in water
  3. CStoring of oxygen gas under pressure in a gas cylinder
  4. DBurning of magnesium ribbon in air

Correct answer

D. Burning of magnesium ribbon in air

Step-by-step solution

In a chemical reaction, the state of the matter changes and the change is irreversible in nature from the given options (d) is correct. 2 Mg + O ₂ 2 MgO + Heat Other three are not a chemical change.

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