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JAMB Chemistry 1991 Question 20

Question 20

Halogens

50 cm3 of sulphur (IV) oxide, 800 cm3 of ammonia, 450 cm3 of hydrogen chloride, 1.0cm3 of carbon (IV) oxide will respectively saturate 1.0 cm3 of water at 15°C. Which of the following is suitable for demonstrating the fountain experiment?

  1. A.Sulphur (IV) oxide and hydrogen chloride.
  2. B.Carbon (IV) oxide and ammonia
  3. C.Ammonia and hydrogen chloride
  4. D.Carbon (IV) oxide and sulphur (IV) oxide.
Show the answer and explanation

Answer: C (Ammonia and hydrogen chloride)

Explanation

The fountain experiment needs a gas that dissolves very quickly and in large amounts. Ammonia (800 volumes) and hydrogen chloride (450 volumes) are the most soluble.