Differentiate between primary pollutants and secondary pollutants.
|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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