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JAMB Chemistry 1988 Question 13

Question 13

Air

The molar ratio of oxygen to nitrogen in dissolved air is 2:1 whereas the ratio is 4:1 in atmospheric air because

  1. A.nitrogen is less soluble than oxygen
  2. B.oxygen is heavier than nitrogen
  3. C.nitrogen has a higher partial pressure in air
  4. D.gases are hydrated in water.
Show the answer and explanation

Answer: A (nitrogen is less soluble than oxygen)

Explanation

Air has much more nitrogen than oxygen, yet dissolved air is richer in oxygen. This is because oxygen is more soluble in water than nitrogen.