Which of the following compounds is responsible for depletion of ozone layer?

Step-by-step solution

Freons are chlorofluorocarbons introduced into the atmosphere from aerosol sprays and refrigerating equipments. They have a very long life time and when they reach stratosphere, they undergo photochemical decomposition and destroy ozone by the following sequence of reactions. CF ₂ Cl ₂ h v CF ₂ Cl ^ + Cl ^ CFCl ₃ h v CFCl ₂^ + Cl ^ Cl ^ + O ₃ ClO ^ + O ₂ ClO ^ +[ O ] Cl ^ + O ₂