Question

The secondary precursors of photochemical smog are

• A. $SO_{2}andNO_{2}$
• B. $NO_{2}$and hydrocarbons
• C. $O_{3}andPAN$
• D. $CO_{2}andO_{2}$

Answer 1

Answer: (C)

$O_{3}andPAN$

Answer 2

: The primary precursors of photochemical smog are $NO_{2}$and hydrocarbons and the secondary precursors are ozone and PAN.