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JAMB Chemistry 1994 Question 15

Question 15

Air

The set-up above would be useful for determining the amount of

Diagram for this question
  1. A.oxygen in air
  2. B.water vapour in air
  3. C.CO2 in air
  4. D.argon in air
Show the answer and explanation

Answer: B (water vapour in air)

Explanation

Anhydrous calcium chloride absorbs water. Weighing the U-tube before and after passing a known volume of air through it gives the mass of water vapour in the air.