Ozone depletion is mainly due to the reaction of ozone (O3) with:
Correct answer: B. CFCs
- A. O2
- B. CFCs
- C. SO2
- D. All of these
Explanation
Chlorofluorocarbons used as refrigerants in air conditioning and in aerosol sprays are inert in the troposphere but slowly diffuse into stratosphere, where they are subjected to ultraviolet radiation generating ClO free radicals. Chlorofluorocarbons (CFCs) play an effective role in removing O3 in the stratosphere .A single chloride free radical can destroy upto 100,000 ozone molecules.
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Atmospheric pollution includes smog, acid rain, greenhouse gases, ozone depletion and the effects of carbon monoxide, sulfur oxides, nitrogen oxides and particulate matter. Water pollution covers sewage, industrial waste, eutrophication and treatment stages, while green chemistry focuses on reducing hazardous substances, waste and energy use through safer, more efficient processes.
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