A) \[C{{F}_{2}}C{{l}_{2}}\]
B) \[{{C}_{7}}{{F}_{16}}\]
C) \[{{C}_{6}}{{H}_{6}}C{{l}_{6}}\]
D) \[{{C}_{6}}{{F}_{6}}\]
Correct Answer: A
Solution :
Chlorofluorocarbons (CFCs or freons like\[C{{F}_{2}}/C{{l}_{2}}\]) are responsible for depletion of the ozone layer in the upper strata of atmosphere. They are stable and inert compounds. They absorb UV-rays and break down liberating free atomic chlorine which causes depletion of ozone through free radical reaction. \[\overset{\centerdot }{\mathop{C}}\,l+{{O}_{3}}\xrightarrow{{}}Cl\overset{\centerdot }{\mathop{O}}\,\,+{{O}_{2}}\] \[Cl\overset{\centerdot }{\mathop{O}}\,\,+{{O}_{3}}\xrightarrow{{}}\overset{\centerdot }{\mathop{C}}\,l+2{{O}_{2}}\]
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