Why ozone hole forms over Antarctica? Ho | Class 12 Biology Chapter Environmental Issues, Environmental Issues NCERT Solutions

Q6. Why ozone hole forms over Antarctica? How will enhanced ultraviolet Radiations affect us?

The ozone hole is more prominent over the region of Antarctica. It is formed due to an increased concentration of chlorine in the atmosphere.

Chlorine is mainly released from chlorofluorocarbons (CFC’s) widely used as refrigerants. The CFC’s magnate from the troposphere to the stratosphere, where they release chlorine atoms by the action of UV rays on them. The release of Chlorine atoms causes the conversion of ozone into molecular oxygen. One atom of chlorine can destroy around 10,000 molecules of ozone and causes ozone depletion.

The formation of the ozone hole will result in an increased concentration of UV - B radiations on the Earth’s surface. UV −B damages DNA and activates the process of skin ageing. It also causes skin darkening and skin cancer. High levels of UV −B cause corneal cataract in human beings.

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What is the correct answer to: Why ozone hole forms over Antarctica? How will enhanced ultraviolet Radiations affect us??

The ozone hole is more prominent over the region of Antarctica. It is formed due to an increased concentration of chlorine in the atmosphere.

Chlorine is mainly released from chlorofluorocarbons (CFC’s) widely ...

How do you solve Why ozone hole forms over Antarctica? How will enhanced ultraviolet Radiations affect us? step by step?

Step-by-step explanation:
• The ozone hole is more prominent over the region of Antarctica
• It is formed due to an increased concentration of chlorine in the atmosphere
•
•
• Chlorine is mainly released from chlorofluorocarbons (CFC’s) widely used as refrigerants

What common mistakes should be avoided in this question?

Students often lose marks by skipping steps, writing incomplete explanations, or misunderstanding keywords used in the question.

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Student Discussion

Arunachal
Class · · , · May 02, 2019
Suraj singh really
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suraj singh
Class · · , · Jan 28, 2017
ok you are right there is high concentration of chlorine in atmosphere of antartica but the reason of this high conc. are stratospheric clouds which formed during colder weather in antartica these clouds enhance the catalytic role of Chloride in stratosphere.
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