Question:
The statement that is not true about ozone is :
Correct Option: , 4
Solution:
In the stratosphere, CFCs release chlorine free radical (Ci)
$\mathrm{CF}_{2} \mathrm{Cl}_{2}(\mathrm{~g}) \stackrel{\mathrm{uV}}{\longrightarrow} \mathrm{Cl}(\mathrm{g})+\dot{\mathrm{CF}}_{2} \mathrm{Cl}(\mathrm{g})$
which react with $\mathrm{O}_{3}$ to give chlorine oxide ( $\mathrm{Cl} \mathrm{O}$ ) radical not chlorine dioxide $\left(\mathrm{ClO}_{2}\right)$ radical.
$\mathrm{Cl}(\mathrm{g})+\mathrm{O}_{3}(\mathrm{~g}) \rightarrow \mathrm{Cl} \dot{\mathrm{O}}(\mathrm{g})+\mathrm{O}_{2}(\mathrm{~g})$