Ozone is a molecule formed by ______ atoms of oxygen. 

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DFCCIL Executive CBT1 Civil 25 Aug 2023 Shift 3 Official Paper
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  1. four
  2. three
  3. five
  4. two

Answer (Detailed Solution Below)

Option 2 : three
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Detailed Solution

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The correct answer is three.

Key Points

  • Ozone is a molecule composed of three oxygen atoms.
  • It is chemically represented as O3.
  • Ozone is crucial in the stratosphere for absorbing the majority of the sun's harmful ultraviolet (UV) radiation.
  • Ground-level ozone is a major component of smog and can be harmful to human health.

Additional Information

  • Formation of Ozone
    • Ozone in the stratosphere is formed when UV light strikes oxygen molecules (O2), splitting them into individual oxygen atoms (O).
    • These oxygen atoms then combine with O2 molecules to form ozone (O3).
  • Ozone Depletion
    • Ozone depletion is primarily caused by human-made chemicals such as chlorofluorocarbons (CFCs).
    • The Montreal Protocol was established to phase out the production of ozone-depleting substances.
  • Ozone Layer
    • The ozone layer is a deep layer in the stratosphere, encircling the Earth, that contains a high concentration of ozone.
    • The ozone layer is essential for protecting life on Earth from the sun's harmful UV radiation.
  • Health Impact of Ozone
    • While stratospheric ozone protects life on Earth, ground-level ozone can cause respiratory problems and other health issues.
    • Exposure to high levels of ground-level ozone can lead to conditions such as asthma, bronchitis, and other lung diseases.
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