On the basis of chemical reactions involved, explain how do chlorofluorocarbons cause thinning of ozone layer in stratosphere ?

Explanation

Cholorofluorocarbons are introduced into the atmosphere from aerosol sprays in which they function as propellants and from refrigerating equipmentgs in which in they acts as coolants. It is also used as solvents.
it has very long life and stey in atmosphere for years and ultimately reach the upper layer of atmosphere (stratosphere) where it decompose in presence of UV-radiation of the sun. On account of decomposition, it forms chlorine atom or free radicals.
`CF_(2)Cl_(2) overset(hv)rarr.^(•)CF_(2)Cl + Cl^(•)`
The active chlorine atoms then destroy teh ozone layer.
`Cl^(•)+O_(3) rarr ClO^(•)+O_(2)`
`ClO^(•)+O rarr Cl^(•)+O_(2)`
it has been found that one molecule of chlorofluorocarbon can destory one thousand ozone molecules in the stratosphere.