Name the common refrigerant. How does it deplete the ozone layer? - Vidyadip

Question

Name the common refrigerant. How does it deplete the ozone layer?

✓

Answer

The main refrigerants used are Freon chlorofluorocarbons (CFC). They deplete ozone layer. The chlorofluorocarbons are decomposed by ultraviolet rays to highly reactive chlorine which is produced in the atomic form.
$
CF _2 Cl _2( g ) \xrightarrow{\text { ultraviolet }} CF _2 Cl ( g )+( g )
$
free radial
The free radical $[ Cl ]$ reacts with ozone and chlorine monoxide is formed.
$
Cl ( g )+ O _3( g ) \longrightarrow ClO ( g )+ O _2( g )
$
This causes depletion of ozone layer and chlorine monoxide so formed reacts with atomic oxygen and produces more chlorine free radicals.
$
ClO + O \rightarrow Cl + O _2
$
Again this free radical destroys ozone and the process continues thereby giving rise to ozone depletion.

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