Ozone is an unstable, dark blue diamagnetic gas. It strongly absorbs the UV radiation, thus protecting the people on the earth from the harmful UV radiation from the sun. The use of chlorofluorocarbon (CFC) in aerosols and refrigerators, and their subsequent escape into the atmosphere, is blamed for making holes in the ozone layer over the Antarctic and Arctic.
Ozone acts as a strong oxidising agent in acidic and alkaline medium. For this property ozone is used as a germicide and disinfectant for sterilising water and improving the atmosphere of crowded places.
(i) CFCs damage ozone layer by reactions :
Text Solution
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(i) All reactions are responsible for the depletion of ozone layer.
(ii) Its (i.e.,ozone) advantage over chlorine is that it avoids the unpleasant smell and taste of chlorine.
True, O 2 
2O ; O + O 2 
O 3 .
(iii) The dark blue colour of ozone is due to intense absorption of red light.
Oxides of nitrogen and the halogen can damage the O 3 layer.
2 I 2 + 9[O 3 ] 
I 4 O 9 + 9O 2
2 KOH + 5 O 3 
2 KO 3 + 5 O 2 + H 2 O
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