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Which among the following is a secondary...

Which among the following is a secondary pollutant?

A

1. Ozone

B

2. Nitrogen Oxide

C

3. Carbon dioxide

D

4. Sulphur Dioxide

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Verified by Experts

The correct Answer is:
A
Tropospheric, or 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 by chemical reactions between two primary pollutants, namely, Oxides of Nitrogen (NOx) and volatile organic compounds (VOCs).
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