passwella.
Menu

JAMB Chemistry 1995 Question 2

Question 2

Separation of Mixtures

Which of the following is an example of a chemical change?

  1. A.Dissolution of salt in water
  2. B.Rusting of iron
  3. C.Melting of ice
  4. D.Separating a mixture by distillation
Show the answer and explanation

Answer: B (Rusting of iron)

Explanation

Rusting makes a new substance (hydrated iron(III) oxide) that cannot easily be turned back into iron. The other three are physical changes.