Chlorine atoms act as catalysts in the deplet | vedclass

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(B) Chlorofluorocarbons $(CFCs)$,also known as Freons,are used in refrigerators and air conditioners. When these $CFCs$ reach the stratosphere,they ab

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Chlorofluorocarbons

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(B) Chlorofluorocarbons $(CFCs)$,also known as Freons,are used in refrigerators and air conditioners. When these $CFCs$ reach the stratosphere,they absorb ultraviolet radiation and release chlorine free radicals $(Cl^{\bullet})$. These chlorine free radicals act as catalysts in the depletion of the ozone layer through the following reactions: $Cl^{\bullet} + O_3 \rightarrow ClO^{\bullet} + O_2$ $ClO^{\bullet} + O \rightarrow Cl^{\bullet} + O_2$ Thus,the correct answer is $Chlorofluorocarbons$.

List-$I$	List-$II$
$A$. Toxic heavy metals	$1$. Soil erosion from agricultural and mineral industries.
$B$. Pesticides	$2$. Domestic sewage disposal.
$C$. Sediments	$3$. Chemical factories and industries.
$D$. Microorganisms	$4$. Substances used to kill insects,fungi,and weeds.

Chlorine atoms act as catalysts in the depletion of the ozone layer in the Earth's atmosphere. These chlorine atoms originate from which of the following?

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