A) Sulphur dioxide and nitrogen oxide
B) Peroxides and PANS
C) Benzopyrene and \[S{{O}_{2}}\]
D) Hydrocarbons and Nitrogen
Correct Answer: B
Solution :
[b] Air pollutants are classified as primary or secondary. Primary pollutants are those that are emitted directly into the atmosphere from an identifiable source. Examples include carbon monoxide and sulphur dioxide. Secondary pollutants are those that are produced in the atmosphere by chemical and physical processes from primary pollutants and natural constituents. For example, ozone is produced by hydrocarbons and oxides of nitrogen (both of which may be produced by car emissions) and sunlight.
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