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JAMB Chemistry 1990 Question 30

Question 30

Halogens

Which of the following gases can be collected by the upward displacement of air?

  1. A.NO
  2. B.H2
  3. C.NH3
  4. D.Cl2.
Show the answer and explanation

Answer: D (Cl2.)

Explanation

Upward displacement of air (downward delivery) is used for gases denser than air: the gas sinks and pushes the air up. Chlorine is much denser than air.