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प्रश्न
On the basis of chemical reactions involved, explain how do CFC’s cause depletion of ozone layer in stratosphere?
उत्तर
In the presence of uv radiation, CFC’s break up into chlorine free radical.
\[\ce{CF2Cl ->[hv] CF2Cl + Cl}\]
\[\ce{CFCl3 ->[hv] CFCl2 + Cl}\]
\[\ce{Cl + O3 → ClO + O2}\]
\[\ce{ClO + O → Cl + O2}\]
Chlorine radical is regenerated in the course of reaction. Due to this continuous attack of Cl thinning of Ozone layer takes place which leads to formation of the ozone hole.
It is estimated that for every reactive chlorine atom generated in the stratosphere 1,00,000 molecules of ozone are depleted.
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संबंधित प्रश्न
What are the reactions involved for ozone layer depletion in the stratosphere?
Ozone depletion will cause ______.
Assertion (A): Oxygen plays a key role in the troposphere.
Reason (R): Troposphere is not responsible for all biological activities.
Which of the following statements is wrong?
Which of the following statements is correct?
Ozone is a toxic gas and is a strong oxidising agent even then its presence in the stratosphere is very important. Explain what would happen if ozone from this region is completely removed?
On the basis of chemical reactions involved, explain how do chlorofluorocarbons cause thinning of ozone layer in stratosphere.
How is ozone produced in stratosphere?
Assertion (A): Ozone is destroyed by solar radiation in upper stratosphere.
Reason (R): Thinning of the ozone layer allows excessive UV radiations to reach the surface of earth.
