Chemistry
Name the common refrigerant. How does it deplete ozone layer ?
Pollution
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Answer
The main refrigerants used are Freon chlorofluorocarbons (CFC). They deplete ozone layer and contribute to global warming. The chlorofluorocarbons are decomposed by ultraviolet rays to highly reactive chlorine which is produced in the atomic form.
The free radical [Cl] reacts with ozone and chlorine monoxide is formed.
Cl + O3 [ozone] ⟶ ClO + O2
This causes depletion of ozone. Chlorine monoxide further reacts with atomic oxygen and produces more free radicals.
ClO + O ⟶ Cl + O2
Again this free radical [Cl] destroys ozone, and the process continues thereby giving rise to ozone depletion.
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