Question

The zone of atmosphere in which ozone layer is present is
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Ionosphere

Answer 1

Hint: The atmosphere is the layer of the air which surrounds the earth. It is a protective layer and has presence of various gases and molecules in it. It is the most essential layer of the Earth. Life is possible on Earth due to its presence.

Complete answer:
The atmosphere is the blanket of air that surrounds the Earth. It has various layers present in it. The ozone layer present in the atmosphere helps in the blocking of the harmful rays of the sun and provides protection from overheating of the planet. Life was made possible on Earth due to the layer of atmosphere surrounding the Earth. The ozone layer is formed in the stratosphere layer of the atmosphere. This layer is present at approximately 15-30km away above the surface of the Earth. It is present at every part of the planet and covers it protectively. The sun rays contain some ultraviolet rays in it which is harmful for the living organism present on the planet. The ozone layer helps in the blockage of these harmful rays and prevents them from entering the Earth surface. The ozone layer present in the stratosphere was naturally formed by the reaction of the oxygen molecules and solar radiation coming from the sun. The ozone layer is depleting due to an increase in the emission of chlorofluorocarbons which is widely used in refrigerators, ACs etc . Global warming is another factor.

So, the answer is ‘stratosphere’.

Note:
The ozone was naturally formed in the stratosphere layer of the atmosphere. Its absence can lead to harmful rays of suns entering the surface of the planet and can cause various types of skin cancers, cataract and can also harm plants and animals of the planet.