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JAMB Chemistry 1979 Question 25

Question 25

Hydrogen, Oxygen and Oxides

Which one of these compounds will NOT give an oxygen gas on heating?

  1. A.Manganese dioxide
  2. B.Hydrogen peroxide
  3. C.Zinc nitrate
  4. D.Sodium nitrate
  5. E.Ammonium nitrate.
Show the answer and explanation

Answer: E (Ammonium nitrate.)

Explanation

Ammonium nitrate decomposes to dinitrogen oxide and water (NH4NO3 → N2O + 2H2O), with no oxygen gas. The nitrates of zinc and sodium and hydrogen peroxide all release oxygen.