The statement that is not true about ozone is :
Show Hint
- In the stratosphere, CFCs release chlorine free radicals (Cl) which reacts with O3 to give chlorine dioxide radicals
- It is a toxic gas and its reaction with NO gives NO2.
- In the atmosphere, it is depleted by CFCs
- In the stratosphere, it forms a protective shield against UV radiation
The Correct Option is A
Solution and Explanation
Option (2): ozone is toxic and \(\mathrm{O_3 + NO \to NO_2 + O_2}\), true.
Option (3): CFCs deplete ozone, true.
Option (4): stratospheric ozone absorbs harmful UV, true.
Answer: (1) In the stratosphere, CFCs release chlorine free radicals (Cl) which reacts with O3 to give chlorine dioxide radicals
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