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SSC CHSL 2020 PYQ — Question 29

SSC CHSL - 12th October 2020 - Shift 2 • General Awareness • Q29

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Most of the atmospheric Ozone is found in which layer of the atmosphere?

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Correct answer: B

Explanation

The correct answer is Option 2 i.e. Stratosphere.

  • Ozone is a gas made up of three oxygen atoms (O3).
  • It occurs naturally in small (trace) amounts in the upper atmosphere (the stratosphere).
  • Ozone protects life on Earth from the Sun’s ultraviolet (UV) radiation.
  • Ninety percent of the ozone in the atmosphere sits in the stratosphere, the layer of the atmosphere between about 10 and 50 kilometers altitude.
  • The natural level of ozone in the stratosphere is a result of a balance between sunlight that creates ozone and chemical reactions that destroy it.