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Q.

Consider the following reactions provided by scientists working in Antarctica about ozone hole   I.ClO•+NO2→  ClONO2             II.Cl•+CH4→  C•H3+HCl   III.ClONO2+H2O→  HOCl+HNO3    IV. ClONO2+HCl→  Cl2+HNO3In summer season, there is less depletion of ozone layer due to reactions

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a

Both I and II

b

Both III and IV

c

Both I and III

d

Both II and IV

answer is A.

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Detailed Solution

In a summer season, reaction I and reaction II take place  (which causes depletion) is eliminated, hence less destruction to O3layer.
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Consider the following reactions provided by scientists working in Antarctica about ozone hole   I.ClO•+NO2→  ClONO2             II.Cl•+CH4→  C•H3+HCl   III.ClONO2+H2O→  HOCl+HNO3    IV. ClONO2+HCl→  Cl2+HNO3In summer season, there is less depletion of ozone layer due to reactions