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NEET2007BotanyEcosystemActual

Ozone in stratosphere extends

Options

  1. A(10-20 ~km )
  2. B(20-25 ~km )
  3. C(15-30 ~km )
  4. D(25-40 ~km ).

Correct answer

B. (20-25 ~km )

Step-by-step solution

Stratosphere zone of earth's atmosphere contains a layer of ozone ( ( O ₃ ) ) which prevents the earth surface from about (99 % ) of incoming solar UV radiations. Ozone layer is present in the stratosphere which is also called ozonosphere. It lies at an altitude of (23-25 ~km ) over equator and its concentration is 300 dobsons.

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