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  • The species which promote ozone depletion is/areOption: 1 <stro

The species which promote ozone depletion is/are

Option: 1

NO_x


Option: 2

CF_2Cl_2


Option: 3

Chlorine radicals


Option: 4

All of these


Answers (1)

best_answer

As we have learnt, 

Ozone layer is depleted by Nitrogen Oxides (NO_x), Chlorofluorocarbon (CF_2Cl_2) and Chlorine radical(\dot{Cl}). 

\mathrm{NO ( g )+ O _{3}( g ) \rightarrow NO _{2}( g )+ O _{2}( g )}

\mathrm{CF _{2} Cl _{2}( g ) \stackrel{ UV }{\longrightarrow} \dot{ Cl } ( g )+\dot{ C } F _{2} Cl ( g )}

\mathrm{\dot{ Cl } ( g )+ O _{3}( g ) \rightarrow Cl\dot{ O }( g )+ O _{2}( g )}

It is to be noted that Freons (Chloroflorocarbons) do not directly react with Ozone. They undergo photolysis to form Chlorine radicals which react with the Ozone and deplete ozone layer.

Hence, the correct answer is Option (4)

Posted by

chirag

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