Question

Ultraviolet radiations from sunlight cause reaction which produces

• A. ${\text{SO}}_2$
• B. $\text{CO}$
• C. ${\text{CH}}_4$
• D. ${\text{O}}_3$

Answer 1

The correct option is D ${\text{O}}_3$

Ozone $\left({\text{O}}_3\right)$
Ozone $\left({\text{O}}_3\right)$ gas is continuously formed in the upper atmosphere due to the reaction of ultraviolet rays with molecular oxygen. The chemical reaction involved in ozone formation is mentioned below:
${\text{O}}_2\to \text{O}+\text{O}$ $\text{(in presence of UV radiation)}$
$\text{O}+{\text{O}}_2\to {\text{O}}_3$
This causes the absorption of ultraviolet rays and avoids its penetration.

Final answer
(A) ${\text{O}}_3$