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Question
‘There is a hole in the ozone layer’. What do you understand by this?
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Solution
The depletion of the ozone layer takes place due to two reactions between ozone and chlorofluorocarbons which are released from an aerosol spray can in air conditioners and refrigerators. The depletion is particularly marked over the Antarctic region. This has resulted in the formation of a large area of thinned ozone layer called the ozone hole.
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RELATED QUESTIONS
Which pollutant released into the air during refrigeration and airconditioning is the greatest contributor to the depletion of ozone layer?
(a) BHC
(b) DDT
(c) CFC
(d) UNEP
The depletion of ozone layer in the upper atmosphere is mainly due to the emission of :
(a) unburnt hydrocarbons
(b) chlorofluorocarbons
(c) greenhouse gases
(d) ultraviolet radiations
Which compounds are responsible for the depletion of ozone layer?
Fill in the Blanks:
______ is manmade compounds that have been widely used as refrigerants and in spray propellants and foam blowing.
Enumerate the damage to humans, animals and plants caused due to ozone depletion.
Select the correct answer from the following statement:
The gas which in presence of U.V. light gives two atoms of the same gas.
Name or state the following:
The atom which reacts with oxygen to form ozone.
Long answer type question
Montreal protocol is an essential step. Why is it so?
Bad ozone is present in ______
Gas A, found in the upper layers of the atmosphere, is a deadly poison but is essential for all living beings. The amount of this gas started declining sharply in the 1980s.
- Identify Gas A. How is it formed at higher levels of the atmosphere?
- Why is it essential for all living beings? State the cause for the depletion of this gas.
