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
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a
ClONO2 +H2O → HOCl +HNO3
b
ClONO2 + HCl → Cl2 + HNO3
c
Both (1) and (2)
d
None of the above
answer is C.
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Detailed Solution
Polar stratospheric clouds provide surface on which ClONO2 is hydrolysed (in (1)). ClONO2 changes to molecular Cl2 in (2). Thus, ozone layer depletion is prevented.