Tuesday, 19 January 2016

Ozone Depletion and Its Effect

                                               Ozone
      Ozone is a light blue gas and has an unpleasant odour. In the troposphere, ozone causes breathing difficulties,asthma and eye irritation. Ozone is an allotropic form of oxygen comprising of three oxygen atoms,O3 ozone is an important gas in the stratosphere.
Explanation:-
      Most of UV radiation coming from sun are filtered or scrrened out by the ozone layer .Otherwise, sunlight wouid be much more hazardous for human beings, animals and plants.On absorbing UV radiation, ozone molecule breaks up to form a oxygen molecule and atomic oxygen.
         O3 → O2 + O
Atomic  oxygen  is very reactive. Atomic oxgen reacts readily with an oxygen molecule to form ozone, there by releasing  heat
    O2 + O →O3 + heat
The destruction anf reformation of ozone are powered by UV radiation.
Human activities disturb this natural balance and  stability  of ozone  layer.
scientists have discovered a reduction in the amount of ozone  in the stratosphere .
The region in which the amount of ozone has been reduced is called as ozone hole.
ozone hole was first discovered in October, 1980 over Antarctica.

No comments:

Post a Comment