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Environmental Chemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryEnvironmental Chemistry1 Mark
Question
Ozone gas is heavier than air. Why does ozone layer not settle down near the earth?
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Answer

Ozone layer is formed at an altitude of 25-30km from earth's surface by action of U.V. light on oxygen.
At this altitude force of gravitation is negligible that is why ozone does not settle near the earth.

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