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JAMB Chemistry 1997 Question 14

Question 14

Environmental Pollution

Which of the following gases is the most dangerous pollutant?

  1. A.Hydrogen sulphide
  2. B.Carbon (IV) oxide
  3. C.Sulphur (IV) oxide
  4. D.Carbon (II) oxide.
Show the answer and explanation

Answer: D (Carbon (II) oxide.)

Explanation

Carbon(II) oxide is colourless and odourless, so it is not noticed, and it binds to haemoglobin far more strongly than oxygen, quickly causing suffocation and death.