Question

# In the upper layers of atmosphere, ozone is formed ?

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

Solution

## The correct option is B By action of ultraviolet rays on oxygen moleculesIn the upper layer of atmosphere, the Ultraviolet rays (UV rays) split the molecule of oxygen $$(O_2)$$ into its constituent 2 atoms.Each of the atom then combine with another oxygen $$(O_2)$$ molecule which gives rise to Ozone$$(O_3)$$.Hence option B is correct answer.Chemistry

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