Question
How is ozone formed naturally?
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Answer
- In the atmosphere, ozone is naturally formed through photochemical reactions.
- Oxygen present in the lower mesosphere on the absorption of solar radiations, is dissociated into two oxygen atoms which oxidise oxygen to ozone.
- One atomic oxygen combines with molecular oxygen to form $O _3$.
$\begin{aligned} & O _2 \xrightarrow{\text { U.V. light }} O + O
\\ & O _2+ O \longrightarrow O _3\end{aligned}$
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