Question

The following figure denotes air pollution, which of the following reaction supports this phenomenon of air pollution?

• A. CH₄ + 2O₂àCO₂ + 2H₂O
• B. CO₂⟶C+O₂
• C. NO₂ + uv --> NO + O
• D. All of the above

Answer 1

The correct option is C

NO₂ + uv --> NO + O

The figure shows smog. Smog is a combination of the words smoke and fog.
Photochemical smog mainly consists of ozone. It is a brown, oxidizing fog. The cause of photochemical smog is nitrogen oxide, which stem from traffic and industries. Ozone is formed according to the following chemical reaction:
$N{O}_2+uv\dot{a}NO+O$
$O+O_2\dot{a}{O}_3$
When the u.v. rays of sunlight strike the $N{O}_2$, it breaks off single oxygen radical (O) that triggers many subsequent reactions of photochemical smog