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JEE Main · 2019 · 12 Jan 2019 · Shift 2 · Environmental Chemistry

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The upper stratosphere consisting of the ozone layer protects us from the sun's radiation that falls in the wavelength region of :
  1. (A)✓ Correct
  2. (B)
  3. (C)
  4. (D)

Answer: (A)

Solution

Stratospheric ozone screens out the biologically damaging short-wavelength ultraviolet, chiefly the UV-B and UV-C bands around nm. The longer visible wavelengths and the very short X-ray values in the other choices are not what the ozone layer absorbs.

JEE Main · 2019 · 12 Jan 2019 · Shift 2 · Single correct option

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