passwella.
Menu

JAMB Chemistry 1980 Question 42

Question 42

Metals and their Compounds

If one of the following oxides is heated with hydrogen or carbon using a bunsen burner, it is not reduced to the metal. Which one is it?

  1. A.Lead oxide
  2. B.Magnesium oxide
  3. C.Copper oxide
  4. D.Tin oxide
  5. E.Iron oxide
Show the answer and explanation

Answer: B (Magnesium oxide)

Explanation

Magnesium is very reactive, so its oxide is too stable to be reduced by hydrogen or carbon at bunsen temperatures. The oxides of less reactive metals are reduced.