Answer» - CFC (Chloro Floro Carbon), CBC (Chloro Bromo Carbon) and BFC (Bromo Floro Carbon). These compounds are collectively called as Freon and they are highly volatile organic compounds. They are used in refrigeration industries, Aerosols, formation of foam, cleaning of many industrial machines etc. The CFC compounds release Chlorine radicals which re-main active for about two years and destroy 1 lakh molecules of Ozone by chain reaction.
CFCl3 → CF CL2 +Cl
Cl + O3 → ClO + O2
ClO + O3 → 2O2 + Cl - Nitrogen Oxides (NO—Nitric Oxide, N2O—Nitrous oxide)—They are released mainly by the chemical fertilizers and they destroy the Ozone.
- Jet Aeroplanes – Most of the jet aeroplanes prefer to fly in/close to the stratosphere. The jet of air and other pollutants released by them harm the Ozone.
- Nuclear blasts also harm the Ozone.
- Deforestation is also a major cause of Ozone depletion.
- Sulphur oxides (SO2, SO3) and Hydrochloric acid (HCl).
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