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Natural Resources — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceNatural Resources1 Mark
MCQ
Formation of ozone hole is maximum over:
  • A
    India
  • ✓
    Antarctica
  • C
    Europe
  • D
    Africa
✓

Answer

Correct option: B.
Antarctica
The thickness of ozone over the poles changes with the seasons, being the lowest in polar spring and maximum in polar autumn.
The ozone hole is formed each year when there is a sharp decline (currently up to $60\%$) in the total ozone over most of Antarctica for a period of about three months (September-November) during spring in the Southern Hemisphere.
This depletion of ozone is due to the action of sunlight over pollutants, which release chemicals like chlorine, that destroy ozone.

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