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JAMB Chemistry 2008 Question 12

Question 12

Air

Air boiled out of water as steam is richer in

  1. A.nitrogen and oxygen
  2. B.carbon (IV) oxide and oxygen
  3. C.noble gases and carbon (IV) oxide
  4. D.oxygen and noble gases.
Show the answer and explanation

Answer: B (carbon (IV) oxide and oxygen)

Explanation

CO2 and O2 are more soluble in water than nitrogen, so air dissolved in water (and boiled out of it) contains a higher share of them than ordinary air.