MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryEnvironmental ChemistryAtmosphere Pollution
Ozone layer is present in: I. Mesosphere II. Hydrosphere III. Mesosphere IV. Stratosphere
A.I and II
B.II and III
C.Only IV✓ Correct
D.I, II and II
Explanation
The stratosphere on the other hand, contains N2, O2 ozone and little amount of vapour. The presence of ozone in the stratosphere prevents about 99.5% of the sun’s harmful UV radiations from reaching the earth’s surface and thereby protecting humans and other animals from its effect.
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