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Explain the relationship between CFCs and Ozone in the stratosphere.             (2 marks)

Explanation:

CFCs discharged in the lower part of atmosphere move upward and reach stratosphere. In stratosphere, UV rays act on them releasing Cl atoms. Cl degrades ozone releasing molecular oxygen with these atoms acting merely as catalysts; Cl atoms are not consumed in the reaction resulting in ozone layer depletion causing the ozone hole.

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