Question

Which is/are the secondary air pollutant(s)?

• A. $O_3$
• B. $HNO_3$
• C. $CO_2$
• D. $H_2SO_4$

Answer 1

Answer: (A), (B), (D)

$O_3$

Answer 2

The correct answer is (A and B and D) : $O_3$ AND $HNO_3$ AND $H_2SO_4$