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Ecosystems — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYEcosystems1 Mark
MCQ
In which layer of atmosphere ozone is maximum concentrated?
  • A
    Troposphere
  • ✓
    Stratosphere
  • C
    Mesosphere
  • D
    Ionosphere
✓

Answer

Correct option: B.
Stratosphere
Ozone layer is a region of concentration of ozone molecule. $O_3 (O_2​ + O)$ in the earth's atmosphere. The layer lies in the stratosphere at an altitude of $18-50 \ km.$ The ozone layer naturally shields earth's life from the harmful effect of the Sun's ultraviolet radiations.

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