Question

About 20 km above the earth, there is an ozone
layer. Which one of the following statements
about ozone and ozone layer is true?
(a) ozone has a triatomic linear molecule
(b) it is harmful as it stops useful radiation
(c) it is beneficial to us as it stops U.V radiation
(d) conversion of O₃ to O₂ is an endothermic reaction

Answer 1

Answer:

(C)it is beneficial as it stops U.V radiation

Answer 2

(b) it is harmful as it stops useful radiation

Explanation:

The ozone layer is a layer of gas in the atmosphere that acts as a film that protects us from the hazardous ultraviolet radiation  from the sun. It is essential to protect this ozone layer from depleting in order to protect us from the harmful effects of these UV radiations. Ozone has a triatomic linear molecule. Conversion of O₃ to O₂ is an endothermic reaction.

Option B is the answer.