The statement that is not true about ozone is:
The statement that is not true about ozone is:
Option 1 -
in the atmosphere, it is depleted by CFCs.
Option 2 -
in the stratosphere, it forms a protective shield against UV radiation.
Option 3 -
in the stratosphere, CFCs release chlorine free radicals (Cl) which reacts with O₃ to give chlorine dioxide radicals.
Option 4 -
it is a toxic gas and its reaction with NO gives NO₂
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1 Answer
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Correct Option - 3
Detailed Solution:In presence of sunlight CFC's molecule divides & release chlorine free radical, which react with ozone give chlorine monoxide radical (CIO°) and oxygen.
CF? Cl? (g) → C (g) + C? Cl (g)
Cl° (g) + O? (g) → ClO° (g) + O? (g)
ClO° (g) + O (g) → Cl° (g) + O? (g)
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