Question on: JAMB Chemistry - 2016
The pollutant that contributes to the depletion of the ozone layer is
A
CFCs
B
NO2
C
SO2
D
CO
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Correct Option: A
The ozone layer is depleted by Chlorofluorocarbons (CFCs). CFCs are compounds containing chlorine, fluorine, and carbon. When released into the atmosphere, they rise to the stratosphere where they are broken down by ultraviolet radiation, releasing chlorine atoms. These chlorine atoms then catalyze the breakdown of ozone molecules.
- A. CFCs: Correct. CFCs are the primary cause of ozone depletion.
- B. NO2: Incorrect. Nitrogen dioxide contributes to acid rain and smog but is not the primary cause of ozone depletion.
- C. SO2: Incorrect. Sulfur dioxide contributes to acid rain but is not the primary cause of ozone depletion.
- D. CO: Incorrect. Carbon monoxide is a poisonous gas and contributes to air pollution but is not the primary cause of ozone depletion.
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