Question
Biology Question on Environmental Issues
Which of the following is a secondary pollutant
A
PAN
B
Paniculate matter
C
Hydrocarbons
D
Chlorofluorocarbons
Answer
PAN
Explanation
Solution
Secondary pollutant is formed from a primary one through change or reaction. The secondary pollutant are more toxic than primary ones. Nitrogen oxides and hydrocarbons react photochemically to produce peroxyacyl nitrates and ozone. Peroxyacyl nitrates are produced due to photochemical reactions between nitrogen oxides and unsaturated hydrocarbons.