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Solution


Q.

Which of the following sets represents the substances required for the formation of ozone
1 Oxygen and IR radiations  
2 Oxygen and UV radiations  
3 Oxygen and radiations of longer wavelengths  
4 Carbon dioxide, water vapour and UV radiations  

Ans.

(2)

Ozone is formed by the action of UV radiations on the oxygen atoms in the upper layers of the atmosphere.