In stratosphere, which of the following radical retards the formation of `O_(3)`?

Options

A. `overset(.)CH_(3)`
B. `overset(.)Cl`
C. `overset(.)F`
D. `Cl_(2)`

Answer

B

Explanation

`overset(.)(C)l` radical obtained from `CFCs` reacts with `O_(3)` present in stratosphere.
`CF_(2)Cl_(2)(g) overset(UV)(rarr) overset(.)(C )(g) + CF_(2)overset(.)(C )l(g)`
`overset(.)(C )l(g)+O_(3)(g) rarr Cl overset(.)(O)(g)+O_(2)(g)`
`Cl overset(.)(C )l(g)+O_(3)(g) rarr Cl overset(.)(O)(g)+O_(2)(g)(O)(g)+O(g) rarr overset(.)(C )l(g)+O_(3)(g) rarr Cl overset(.)(O)(g)+O_(2)(g)(C )ll(g)+O_(2)(g)`.