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Environmental Chemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryEnvironmental Chemistry3 Marks
Question
How is ozone produced in stratosphere?
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Answer

Ozone in the stratosphere is a product of UV radiations acting on dioxygen ($\mathrm{O}_2$) molecules. The UV raditions split apart moleculer oxygen into free oxygen (O) atoms, These oxygen atoms combine with molecular oxygen to form ozone.
$\text{O}_2\text{(g)}\xrightarrow{ \ \ \ \text{UV} \ \ \ }\text{O}\text{(g)}+\text{O}\text{(g)}$
$\text{O}\text{(g)}+\text{O}_2\text{(g)}\overset{\text{uv}}{\rightleftarrows}\text{O}_3\text{(g)}$

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