Railway Recruitment Board General Awareness — Question 1528

Question

Which of the following is an example of a secondary pollutant?

  1. Carbon monoxide
  2. Ground-level ozone
  3. Sulphur dioxide
  4. Nitric oxide

Correct answer

B — Ground-level ozone

Explanation (English)

Ground-level ozone is a secondary pollutant formed when primary pollutants react in sunlight.

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