Ozone layer
Ozone layer: Overview
In this topic, we will learn about ozone layer. It is a protective layer that absorbs and prevents harmful UV radiation from reaching the Earth's surface. It also discusses the various factors responsible for the degradation of ozone.
Important Questions on Ozone layer
Identify landmark agreement that has successfully reduced the global production, consumption, and emissions of ozone-depleting substances (ODSs):

Montreal protocol was set in place to reduce the emissions of greenhouse gases.

What products were banned due to the Montreal Protocol?

Identify the Environment Protocol for protecting Ozone layer on the basis of given information:
An international agreement to protect the ozone layer is expected to prevent million cases of skin cancer and million cataract cases for people born in the United States through the end of this century, according to new research:

Chlorofluorocarbons (CFCs) cause significantly stratospheric ozone depletion and global warming relating to the _____ effect.


Choose the correct statement/s related to chlorofluorocarbons (CFCs).

Chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs) and halons destroy the earth's protective argon layer.

Which disease is caused due to hole in the ozone layer and why?

Consider the following statements regarding O3 layer.
I. O3 layer is found in troposphere.
II. O3 layer absorbs IR-radiation.
III. O3 layer absorbs UV-radiation.
Identify the correct statement.

Write the name of two constituent of troposphere.

What are the two forms of oxygen found in the atmosphere?

If all the oxygen present in the environment gets converted to ozone, what is most likely to happen?

State any difference between oxygen and ozone?

What would happen, if all the oxygen present in the environment is converted to ozone?

What are the consequences of the depletion of the ozone layer?

Although ozone is poisonous, yet it performs a very important role for us. Identify the role of gaseous ozone.


Depletion of ozone molecules in the stratosphere is due to

Ozone layer is found in which layer of the atmosphere?
