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Differentiate Between Primary Pollutants and Secondary Pollutants. - Science and Technology 1

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Differentiate between primary pollutants and secondary pollutants.

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Solution

  Primary pollutants   Secondary pollutants
1 They are emitted directly from the source. 1 They are not emitted directly from the source but are formed due to chemical reactions.
2 They are found in the atmosphere in the form in which they are emitted. 2 They are formed in the atmosphere by chemical reactions between primary pollutants and atmospheric constituents.
3 Ash, smoke, dust, radioactive compounds, oxides of sulphur, carbon and nitrogen are primary pollutants. 3 SO3, O3, hydrogen cyanide, peroxyacetyl nitrate, ketones etc. are secondary pollutants.
Concept: Pollution and Its Types
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