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Pollutants can be classified as primary and secondary. Which of these is/are primary pollutant?
1. Volatile Organic Compunds
2. Ground Level Ozone
3. Acid Rain
Select the correct answer using the codes given below.
  • a)
    1 only
  • b)
    1 and 2 only
  • c)
    1 and 3 only
  • d)
    1,2 and 3 ​
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Pollutants can be classified as primary and secondary. Which of these ...
A primary pollutant is an air pollutant emitted directly from a source. A secondary pollutant is not directly emitted as such, but forms when other pollutants (primary pollutants) react in the atmosphere. Ground Level Ozone is a “secondary” pollutant because it is produced when two primary pollutants react in sunlight and stagnant air. These two primary pollutants are nitrogen oxides (NOx) and volatile organic compounds (VOCs). Acid rain ofcourse is a secondary pollutant.
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