Question

Which of the following gases protects us from the harmful sun?

• A. Carbon dioxide
• B. Nitrogen
• C. Ozone
• D. Oxygen

Answer 1

The correct option is C

Ozone

Explanation for the correct option

• Ozone is an allotrope of oxygen that is made up of three oxygen atoms.
• The chemical formula of ozone is ${\mathrm{O}}_3$ .
• Ozone is less stable than the diatomic allotrope ${\mathrm{O}}_2$.
• Ozone is present in the stratosphere which forms a layer that protects us from harmful UV radiations emitted by the sun.

Hence, the correct option is (C). Ozone gas protects us from the harmful sun.