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WAEC Geography 2016 Question 23

Question 23

Structure of the Earth

Which of the following gases is found in very little quantity in the atmosphere?

  1. A.Argon
  2. B.Carbon dioxide
  3. C.Nitrogen
  4. D.Oxygen
Show the answer and explanation

Answer: B (Carbon dioxide)

Explanation

Carbon dioxide makes up only about 0.04% of the air, less than argon (about 0.93%), oxygen (21%) or nitrogen (78%).