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About 20 m above the earth, there is an ...

About 20 m above the earth, there is an ozone layer. Which one of the following statement about ozone and ozone layer is true?

A

It is beneficial to us as it stops U.V. radiation

B

Conversion of `O_(3)` to `O_(2)` is an endothermic reaction

C

Ozone has a triatomic linear molecule

D

It is harmful as it stops useful radiation

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AAKASH INSTITUTE ENGLISH-ENVIRONMENTAL CHEMISTRY-ASSIGNMENT (SECTION-B)
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