Question

In which part of the atmosphere does the ozone layer present?
(A) stratosphere
(B) troposphere
(C) mesosphere
(D) Thermosphere

Answer 1

Hint: The earth’s atmosphere is divided into layers based on the temperature. Six layers divided the earth’s atmosphere. Those are the troposphere, the stratosphere, the mesosphere, the thermosphere, the ionosphere, and the exosphere. Most of the greenhouse gases are in these layers.

Complete step by step answer:
Out of six layers in the earth’s atmosphere, the most important layer according to the environmental approach is the stratosphere.
The gas mostly found in the stratosphere is ozone, the chemical formula is ${{O}_{3}}$ . This ozone gas is one of the greenhouse gases in the earth's atmosphere. Greenhouse gas means the characteristic of gas which absorbs infrared radiation from the earth's surface.
A large amount of ozone gas in the stratosphere is referred to as the ozone layer. This stratosphere holds 19 percent of gases with very little water vapor.
Nitrogen (78.08%), oxygen (20.95%) and Argon (0.93%) gases mixture present in the stratosphere layer.
Stereoscopic chemistry was better than the chemistry of ozone. There are no reachable gases from the earth's atmosphere in the stratosphere. Almost 85-90% ozone gas in the atmosphere is found in the stratosphere. So, inorganic compounds like nitrogen oxides, nitric acid, sulphuric acid, halogens and halogen oxides from CFCs are the major chemicals in the stratosphere.
Hence, the ozone layer present in the stratosphere layer.
So, the correct answer is “Option A”.

Note: Air is densest in the troposphere layer. Except for ozone gas, the remaining greenhouse gases are in other layers. The troposphere is a highly oxidizing medium which is the lower layer of the earth’s atmosphere.