Question

Statement 1 (S1): Ozone generates heat in the stratosphere by absorbing ultraviolet radiation.
Statement 2 (S2): UV rays decompose ozone molecule into oxygen molecule and oxygen atom.

• A. Both S1 and S2 are false.
• B. S1 is true but S2 is false.​
• C. S1 is false but S2 is true.​
• D. Both S1 and S2 are true.​

Answer 1

The correct option is D Both S1 and S2 are true.​

Ozone absorbs high energy UV rays from the sun and is broken down into atomic oxygen (O) and diatomic oxygen. Ozone is again changed to oxygen molecule by absorbing ultraviolet rays having less energy.​
Absorption of UV rays by ozone in the stratosphere reduces the amount of UV rays reaching the earth's surface and also generates heat that plays a role in maintaining the temperature structure of the atmosphere.

Hence, both the statements are true.