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Question
Explain the formation of ozone in the atmosphere.
Solution
In the atmosphere, ozone is formed by the action of ultraviolet rays of the Sun on oxygen.
3O2(g)→ 2O3(g)
High-energy UV radiation breaks oxygen molecules into oxygen atoms.
O2 + Far UV → O + O
Oxygen atom reacts with the oxygen molecules to form ozone.
O + O2→ O3
Net reaction is
2O2 + Far UV → 2O3
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