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JAMB Chemistry 2022 Question 34

Question 34

Air

In the above experiment Y is

Diagram for this question
  1. A.pure nitrogen
  2. B.a mixture of nitrogen and oxygen
  3. C.a mixture of nitrogen and carbon dioxide
  4. D.a mixture of nitrogen and inert gases
Show the answer and explanation

Answer: D (a mixture of nitrogen and inert gases)

Explanation

Alkaline pyrogallol absorbs oxygen (and carbon(IV) oxide) and CaCl2 absorbs water vapour, leaving nitrogen with the noble gases.