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Question

Among the following, the only secondary pollutant is:


  1. SO2
  2. CO
  3. O3
  4. NO

A
SO2
B
O3
C
NO
D
CO
Solution
Verified by Toppr

The correct option is C O3
Secondary pollutants are the compounds which combine with primary pollutants through chemical or photochemical reactions.
Here Ozone is secondary pollutant.

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