Class 12 Chemistry P Block Elements Ozone

Ozone

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

Preparation:

  • 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.

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