Question

Which of the following is secondary pollutant?

• A. $C{{O}_{2}}$
• B. ${{N}_{2}}O$
• C. PAN
• D. $S{{O}_{2}}$

Answer 1

Answer: (C)

PAN

Answer 2

Pollutants which are formed by reaction amongst the primary pollutants (persist in the environment in the form they are passed into it) are called as secondary pollutants eg, peroxyacyl nitrates (PAN) are formed through reaction between nitrogen oxides and hydrocarbons in the presence of sunlight.