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प्रश्न
Discuss in detail the process of ozone depletion.
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उत्तर
The upper part of stratosphere contains large amount of Ozone gas. The ozone gas blocks the harmful ultraviolet rays reaching earth. It has been proved that chlorofluorocarbons or CFC are released from the refrigeration system, air conditioning systems, spray cans etc. These CFC’s are light and are able to reach at height of stratosphere. Here they react with the ozone gas. In this process the chlorine gas is released which reacts with the ozone gas. It breaks apart the ozone molecules thus reducing them in the stratosphere. As a result, the ultraviolet radiation is able to reach the surface of earth. These rays can cause skin cancer, cataract and affect the immune system of the body.
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संबंधित प्रश्न
How depletion of the ozone layer affect living organisms?
The depletion of ozone layer in the upper atmosphere is mainly due to the emission of :
(a) unburnt hydrocarbons
(b) chlorofluorocarbons
(c) greenhouse gases
(d) ultraviolet radiations
How are CFCs harmful?
Explain what is smog. Give its effects.
Number of Oxygen atom in Ozone.
The chemicals leading to the formation of ozone holes.
State how CFCs break ozone in the stratosphere.
Give reason for the following:
The formation of ozone involves a chemical reaction called photolysis.
Give reason for the following:
Destruction of ozone layer is harmful for both humans and plants.
Which of the following may be a conclusion of the excessive exposure of humans to sun’s ultraviolet rays?
- Peptic ulcers
- Eye disease like cataract
- Damage to lungs
- Skin cancer
