how is ozone formed ? state its importance
Answers
HERE IS YOUR ANSWER:-
=> ozone is formed naturally by chemical reactions involving solar ultraviolet radiation (sunlight) and oxygen molecules, which make up 21% of the atmosphere.
It is very important for us because it saves the earth from dangerous and powerful UV rays which come from sun to earth.
As it also helps the environment by controlling the global warming in the environment.
So,that's why it is very important just like a gift of nature which saves us from the the negative effects of sun on earth.
HOPE IT WILL HELP YOU!!!!
<<<<❤️❤️❤️❤️>>>>
✌️✌️✌️✌️✌️✌️✌️
^_^
Explanation:
Formation of Ozone
The reaction of UV radiation with O2 or dioxygen molecules results in the formation of O3. The UV radiation splits the oxygen molecule into the free oxygen or O atoms. These O atoms combine with molecular form of oxygen to form ozone (O3). It is thermodynamically an unstable compound and has a tendency to decompose into molecular oxygen. Therefore, a constant dynamic equilibrium is present between the production and decomposition of O3 molecules.
O2(g) → O(g) + O(g)
(in presence of UV Radiation)
O(g) + O2(g) ↔ O3(g)
(in presence of UV Radiation)
Depletion of Ozone Layer
In the past decade, we have come across constant news about depletion of the ozone layer. The seriousness of the situation made global regulatory bodies like the UN and the countries to work together to bring this constant depletion to a halt. So, what is the reason for depletion of ozone?
The depletion of the protective O3 layer is because of the presence of particular chemicals in the stratosphere of earth’s atmosphere. The constant release of compounds like carbon tetrachloride, carbon tetrafluoride, CFCs (chlorofluorocarbon) or freons and other chlorine or bromine containing halogens in the atmosphere is the main reason for the depletion.
CFC compounds are non-inflammable, non-toxic, nonreactive organic molecules. Hence, it is used in air conditioners, refrigerators, plastic foam production, cleaning computer parts, etc.
However, these chemicals mix with normal atmospheric gases and finally reach the stratosphere. Thus, these compounds break down into free chlorine radicals in the presence of powerful UV radiation in the stratosphere.
CF2Cl2 (g) → Cl(g) + CF2Cl(g)
(in presence of powerful UV Radiation)
The chlorine radicals combine with the stratospheric O3 thereby forming molecular oxygen and chlorine monoxide radicals.
Cl(g) + O3(g) → ClO(g) + O2(g)
Chlorine monoxide radicals will further react with atomic oxygen to form more chlorine radicals.
ClO(g) + O(g) → Cl(g) + O2(g)
This process will continue and constantly regenerate chlorine radicals. This, in turn, will lead to the breakdown of ozone. Hence, CFCs are transporting agents that are responsible for damaging the ozone layer.