environment medium Fill in the Blank

The chemical formula for ozone, a molecule composed of three oxygen atoms, is _____.

  1. O2
  2. O3
  3. CO2
  4. H2O

Answer: O3

Ozone (O3) in the stratosphere protects from UV radiation, but at ground level it is a harmful pollutant and greenhouse gas.

Topic Environmental Chemistry
Exam Relevance UPSC, SSC
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