Class 12 Chemistry P Block Elements Ozone


It is represented as O3. It is found in upper atmosphere.


  • It is prepared when ultraviolet rays. They react with oxygen of upper atmosphere and splits oxygen molecule in oxygen atoms. Then this oxygen atom combines with oxygen molecule to form ozone:
  • 3O2 ---> 2O3
  • Oxygen   Ozone
  • The reaction is endothermic approx. 142.7kJ of heat is needed.
  • For preparing pure ozone we use ozoniser, in which the electric spark is passed through oxygen gas and we get ozone.

Share these Notes with your friends  

< Prev Next >

You can check our 5-step learning process