Question

Which of the following is a secondary pollutant ?

• A. $O_3$
• B. $CO$
• C. $SO_2$
• D. $CO_2$

Answer 1

Answer: (A)

$O_3$

Answer 2

$O _{3}$ (ozone) is a secondary pollutant. These are formed by the reaction of primary pollutant. $CO$ - Quantitative pollutant $CO _{2}$ - Primary pollutant $SO _{2}-$ Primary pollutant