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JAMB Chemistry 1997 Question 31

Question 31

Hydrogen, Oxygen and Oxides

A compound that will NOT produce oxygen on heating is

  1. A.potassium dioxonitrate (III)
  2. B.lead (IV) oxide
  3. C.potassium trioxochlorate (V)
  4. D.potassium trioxonitrate (V).
Show the answer and explanation

Answer: A (potassium dioxonitrate (III))

Explanation

Lead(IV) oxide, KClO3 and KNO3 all give off oxygen when heated. Potassium dioxonitrate(III), KNO2, is the product of heating KNO3 and does not decompose further to give oxygen.