Differentiate between primary pollutants and secondary pollutants?

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Solution

Primary Pollutants Secondary Pollutants
These are radiated from the source itself These are produced by the chemical reaction between primary pollutants and the elements of the atmosphere.
In the atmosphere, these are found in the original state. These are not found in the original state.
E.g: ash, smoke, radioactive compounds etc. E.g: Hydrogen cyanide, peroxyacetyl nitrate, ketones etc.

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S O_{2}

C O

O_{3}

N O

	Column I		Column II
(A)	Biodegradable pollutants	(i)	DDT
(B)	Non-biodegradable pollutants	(ii)	$S O_{2}$
(C)	Primary pollutants	(iii)	PAN
(D)	Secondary pollutants	(iv)	Sewage

S O_{2}

C O

O_{3}

N O

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Primary Pollutants	Secondary Pollutants
These are radiated from the source itself	These are produced by the chemical reaction between primary pollutants and the elements of the atmosphere.
In the atmosphere, these are found in the original state.	These are not found in the original state.
E.g: ash, smoke, radioactive compounds etc.	E.g: Hydrogen cyanide, peroxyacetyl nitrate, ketones etc.