Question

In winter season, special type of clouds called polar stratospheric clouds are formed over Antarctica. As a result, less depletion of ozone layer takes place due to reactions
A. `CIONO_(2)+H_(2)O rarr HOCI+HNO_(3)`
B. `CIONO_(2)+HCl rarr Cl_(2)+HNO_(3)`
C. both (a) and (b)
D. none of the above

Answer 1

Correct Answer - C
Polar strtospheric clouds provide surface on which `ClONO_(2)` is hydrolysed (in (a)), `ClONO_(2)` changes to molecular `Cl_(2)` in (b) Thus, ozone layer depletion is prevented.