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  • (a) Explain the role of UV radiation in producing ozone layer. (b) Mention the reaction involved. (c) Why is excessive use of CFCs a cause of concern ?      </

(a) Explain the role of UV radiation in producing ozone layer.
(b) Mention the reaction involved.
(c) Why is excessive use of CFCs a cause of concern ?

 

 

 

 
 
 
 
 

Answers (2)

a) When an ozone molecule absorbs UV-B, it comes apart into an oxygen molecule (O2) and a separate oxygen atom (O). The ozone layer absorbs UV-B radiation from the sun and by absorbing UV-B in the stratosphere, the ozone layer prevents and reduce the harmful levels of this radiation from reaching Earth's surface.

b) 

O2 + UV = O + O

2 O + 2 O2 + third molecule = 2 O3 + third molecule

Net Reaction: 3 O2 + UV = 2 O3

c) When CFCs reaches the upper layer of the atmosphere, they cause depletion of the ozone layer and it allows harmful UV radiations to reach the surface of the earth which create health hazards.

Posted by

Safeer PP

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Uvc split oxygen molecules into oxygen atom.there single atom can react with other oxygen molecules to produce ozone.

 

Posted by

Abhigyan varshney

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