Question

Which of the following statement about ozone is correct?
A. it is essential for breathing
B. it absorbs ultraviolet rays
C. its proportion in air is about 3%
D. it is mainly responsible for global warming

Answer 1

Answer:

it absorb ultraviolet rays

Answer 2

B. Ozone layer absorbs ultraviolet rays is the correct statement related to ozone.

Explanation

• Ozone layer is a thin layer of $O_3$ molecules enclosing the earth.

• The UV-B rays and UV-C rays are very harmful for the living forms present in the earth.
• Ozone layer absorbs UV rays through chemical reaction occurring between $O_3$ molecules and rays from sun.
• When the UV rays falls on ozone, $O_2$ molecules are converted into O atoms. Later, the oxygen atoms combine with $O_2$ molecules to produces $O_3$ molecules.
• This way, the ozone molecule reforms and absorbs UV rays in cyclic manner.