Question

Which day is celebrated as World Ozone Day?
a. 22nd August
b. 10th September
c. 16th September
d. 13th November

Answer 1

Hint:
With the chemical formula O3, ozone is a special type of oxygen. O2 is the oxygen that we breathe and that is so important to live on earth.

Complete solution:
16 September was declared World Ozone Day by the United Nations General Assembly in 1994, commemorating the signing, in 1987, of the Montreal Protocol on Substances that Deplete the Ozone Layer

A very small amount of our environment is ozone, but its existence is still important to human well-being. High up in the atmosphere, between 10 and 40 km above Earth's surface, much of the ozone resides. The stratosphere is called this area because it comprises about 90 per cent of all the ozone in the atmosphere.
Stratospheric ozone absorbs some of the biologically toxic ultraviolet radiation from the Sun. Stratospheric ozone is considered to be healthy ozone because of this beneficial function. By comparison, excess ozone produced from contaminants on the Earth's surface is called "poor" ozone because it can be toxic to humans, plants, and animals. As ozone helps to eliminate contaminants from the environment, the ozone that exists naturally near the surface and in the lower atmosphere is also beneficial.

The occurrence of ozone depletion over Antarctica was referred to as the ozone hole following the publication of the results of a British Antarctic Survey article in May 1985, a term first attributed to Nobel Prize winner Sherwood Rowland.


Hence, the correct answer is option C.

Note:
It has been found that a variety of widely used chemicals are highly harmful to the ozone layer. Halocarbons are chemicals that are connected to one or more halogen atoms by one or more carbon atoms. bromine-containing halocarbons typically have much greater ozone-depleting potential ( ODP) than chlorine-containing ones.