UPPSC 2014 GS-I Environment & Ecology
Question

Which one of the following is not a secondary pollutant ?

Answer & Solution

Answer: (Detailed Solution Below)

Option C: Sulphur dioxide

Detailed Solution:

The correct answer is “Sulphur dioxide”.

Sulphur dioxide is not a secondary pollutant. It is a primary pollutant, meaning it is directly emitted into the atmosphere, typically from industrial processes and combustion of fossil fuels.

Secondary pollutants, on the other hand, are formed in the atmosphere through chemical reactions involving primary pollutants. PAN (Peroxyacetyl nitrate), Smog, and Ozone are examples of secondary pollutants.

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