Question

Examples of secondary air pollutants is /are

• A. Smog
• B. $O_{3}$
• C. PAN
• D. All of these

Answer 1

Answer: (D)

All of these

Answer 2

The secondary pollutants are not emitted directly. They are formed in the air when primary pollulants react or interact. These include smog, $O_{3},$ PAN, etc.