Which of the following compounds is responsible for the depletion of ozone layer?
Correct answer: A. Chlorofluorocarbons
- A. Chlorofluorocarbons
- B. Carbon tetrachlorie
- C. Methane
- D. Hydroflorocarbons
Explanation
Factual recall.Chlorofluorocarbons (CFCs) have a significant effect on the ozone layer. When released into the atmosphere, CFCs can reach the stratosphere, where they undergo photodissociation due to the absorption of ultraviolet (UV) radiation. This process releases chlorine and bromine atoms.These chlorine and bromine atoms act as catalysts in ozone depletion reactions. They catalytically destroy ozone molecules, breaking them apart and reducing the overall concentration of ozone in the stratosphere.
This question appeared on the UHS MDCAT 2019 paper, which you can sit online with every answer explained.
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