Question

Ozone is formed in stratosphere by action of ultravoilet radiations on oxygen.

• A. True
• B. False
• C. Either
• D. Neither

Answer 1

The correct option is A True

Ozone (O₃) molecule is made up of three oxygen atoms. It is formed in the stratosphere when single oxygen atom combines with a molecule of oxygen i.e. when [O] combines with O₂. Oxygen molecule consisting of two oxygen atoms splits into atomic oxygen in the presence of ultraviolet radiation. The atomic oxygen then combines with another molecule of oxygen to form ozone.

The reactions are as follows:

UV light

O₂ ---------------> [O] + [O]

[O] + O₂ ---------->O₃

Hence, the statement given in the question is correct.

So, the correct answer is 'True'.