Question

Which of the following reaction results in photochemical smog?

• A. $N{O}_2\left(g\right)\underrightarrow{hv}NO\left(g\right)+O$
• B. $NO\left(g\right)+O_3\to N{O}_2\left(g\right)+O_2\left(g\right)$
• C. $Cl\left(g\right)+O_3\left(g\right)\to ClO\left(g\right)+O_2\left(g\right)$
• D. Both (a) and (b)

Answer 1

The correct option is D

Both (a) and (b)

$N{O}_2\left(g\right)$ which is formed from $NO$, decomposes by absorbing sunlight to $NO$ and free oxygen atom.

$N{O}_2\left(g\right)\underrightarrow{hv}NO\left(g\right)+O$

$O+O_2\rightleftharpoons O_3$

$O_3+NO\left(g\right)\to N{O}_2\left(g\right)+O_2\left(g\right)$