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Question

In the upper layers of atmosphere, ozone is formed ?

A
By action of electric discharge on oxygen molecules
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B
By action of ultraviolet rays on oxygen molecules
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C
By action of infrared rays on oxygen molecules
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D
Due to sudden drop of pressure
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Solution

The correct option is B By action of ultraviolet rays on oxygen molecules
  • In the upper layer of atmosphere, the Ultraviolet rays (UV rays) split the molecule of oxygen (O2) into its constituent 2 atoms.
  • Each of the atom then combine with another oxygen (O2) molecule which gives rise to Ozone(O3).
  • Hence option B is correct answer.

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