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Question

Allotrope of this element is the primary absorber of UV solar radiation in Earth's atmosphere :

A
Carbon
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B
Nitrogen
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C
Oxygen
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D
Neon
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E
Argon
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Solution

The correct option is B Oxygen
Ozone is an allotropic form of oxygen.
It is too reactive to remain for long in the atmosphere at sea level.
At a height of about 20 kilometres, it is forrmed from the atmospheric oxygen in the presence of sunlight.
This layer protects us from the excessive concentration of U.V radiation.
Hence, option C is correct.

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