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प्रश्न
Which aerosols deplete ozone?
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उत्तर १
Freons, or chlorofluorocarbons (CFCs), are aerosols that accelerate the depletion of ozone. In the presence of ultraviolet radiation, molecules of CFCs break down to form chlorine-free radicals that combine with ozone to form oxygen.
उत्तर २
Aerosols of chlorofluorocarbons (CFCs), such as Freon (CCl2F2), destroy the stratosphere’s ozone layer. The following are the reactions that take place.
\[\ce{\underset{Freon}{CF2Cl2} + hv -> CF2\overset{\bullet}{C}l + \overset{\bullet}{C}l}\]
\[\ce{\overset{\bullet}{C}l + O3 -> Cl\overset{\bullet}{O} + O2}\]
\[\ce{Cl\overset{\bullet}{O} + O -> \overset{\bullet}{C}l + O2}\]
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