Pollutants can be classified as primary and secondary Which of these is are primary pollutant 1 ...........

Environment and Ecology Air Pollution

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Pollutants can be classified as primary and secondary. Which of these is/are primary pollutant?

1. Volatile Organic Compounds

2. Ground Level Ozone

3. Acid Rain

Select the correct answer using the codes given below.

1 only

1 and 2

1 and 3

1, 2 and 3

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Explanation:

2nd is incorrect. Ground-level ozone is a colorless and highly irritating gas that forms just above the earth's surface. It is called a "secondary" pollutant because it is produced when two primary pollutants react in sunlight and stagnant air.
3rd is also incorrect because acid rain is caused by emissions of sulfur dioxide and nitrogen oxide.