Question

Depletion of ozone layer is noticed on
A. America
B. Asia
C. Australia
D. All over the earth

Answer 1

Hint: The ozone layer covers the whole earth. There is as such no hole formation in the ozone. The ozone is thinning everywhere.

Step by step answer:The ozone layer is the thin part of the atmosphere of the ozone holes are popular terms which refer to the areas where the ozone layer is damaged. This is fallacious. Ozone layer damage is more similar to the thing of the layer or formation of a patch. The ozone layer has a high concentration of molecule, ozone, represented by ${{O}_{3}}$. The main function of the ozone layer is to filter the Sun's rays which have ultraviolet radiation. These radiations are very harmful for humans as they can cause skin allergies and cancer. So, this layer protects life against the threat of UV radiation. It also regulates Earth’s temperature. The term ozone depletion is referred to the process of destruction of ${{O}_{3}}$ which surpasses the number of processes that result in the creation of ${{O}_{3}}$. Ozone depletion occurs due to chlorofluorocarbons and halons which gases found in aerosol spray cans and refrigerants. They have chlorine. Chlorine reacts with ozone quickly to produce chlorine oxide, degrading the layer.

Hence, the correct option is option D.

Note: The production of ozone in the stratosphere is because of the breaking of the chemical bonds present in the oxygen molecules which is done by high-energy solar photons. This process is called photodissociation. This results in the release of oxygen atoms. These atoms later join with the oxygen molecules to form ozone. It is considered that the concentration of oxygen in the atmosphere increased two billion years ago. This allowed the ozone layer and the atmosphere to build up around the earth.