Question:

Given below are two statements :

Statement I : Chlorofluoro breakdown by radiation in the visible energy region and release chlorine gas in the atmosphere which then reacts with stratospheric ozone.

Statement II : Atmospheric ozone reacts with nitric oxide to give nitrogen and oxygen gases, which add to the atmosphere.

For the above statements choose the correct answer from the options given below :

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CFCs are broken down by UV light, and NO reacts with ozone to give NO2 and O2.
Updated On: Nov 4, 2026
  • Statement I is incorrect but Statement II is true
  • Both Statement I and II are false
  • Statement I is correct but Statement II is false
  • Both Statement I and II are correct
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The Correct Option is B

Solution and Explanation

Statement I: CFCs are decomposed by ultraviolet (not visible) radiation in the stratosphere, releasing chlorine free radicals (not chlorine gas) that destroy ozone. So Statement I is false.
Statement II: Ozone reacts with nitric oxide as \(\mathrm{NO + O_3 \to NO_2 + O_2}\); it gives nitrogen dioxide and oxygen, not nitrogen and oxygen. So Statement II is false.
Both statements are false.
Answer: (2) Both Statement I and II are false
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