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Question: Which of the following free radicals is responsible for causing break down of ozone into oxygen due ...

Which of the following free radicals is responsible for causing break down of ozone into oxygen due to use of CFCs?

A

O

B

Cl

C

CH3CH_{3}

D

OH

Answer

Cl

Explanation

Solution

: CF2Cl2→UVC∙l+CF2C∙lCF_{2}Cl_{2}\overset{\quad UV\quad}{\rightarrow}\overset{\bullet}{C}l + CF_{2}\overset{\bullet}{C}l

C∙l+O3→CIO∙+O2,ClO∙+O→C∙l+O2\overset{\bullet}{C}l + O_{3} \rightarrow CI\overset{\bullet}{O} + O_{2},Cl\overset{\bullet}{O} + O \rightarrow \overset{\bullet}{C}l + O_{2}

The chlorine radicals are continuously regenerated and cause the break down of ozone.