Q. Secondary air pollutant is:
Solution:
- Secondary pollutants are pollutants which form in the atmosphere.
- These pollutants are not emitted directly from a source (like vehicles or power plants).
- Secondary pollutants are certain gases that are synthesized by photochemical reactions in the lower atmosphere.
- Some important secondary pollutants, most notably ozone, peroxy acetyl nitrate, hydrogen peroxide and aldehydes.
- Ozone is formed when hydrocarbons (HC) and nitrogen oxides (NOx) combine in the presence of sunlight
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