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प्रश्न
State how CFCs break ozone in the stratosphere.
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उत्तर
Depletion of 03 (ozone) by CFCs:
CFC [CFCl3 ] is broken by UV of sunlight to produce [Cl] atom or free radical [Cl] which highiy reactive in the atomic form and forms C10[g] with O2
\[\ce{CFCl3 ->[UV(Sum)] CFCl2 + Cl [atom]}\]
C l [g] + O3[g] → ClO[g] + O2[g]
This depletes ozone.
CIO further produces more [Cl] free radical
Cl0[g] + O[g] → Cl[g] O2[g] and destroys more of O3 and there by giving rise of ozone depletion.
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संबंधित प्रश्न
Explain how, harmful ultraviolet radiations of sunlight are prevented from reaching the earth's surface.
What step has been taken by UNEP in 1987 to prevent too much damage to the ozone layer?
Explain what is smog. Give its effects.
Name the following pollutants:
Any two chemicals leading to the formation of ozone holes.
State two effects of ozone depletion.
How is ozone formed in the upper atmosphere? State its importance. What is responsible for its depletion? Write one harmful effect of ozone depletion.
Fill in the Blanks:
______ is manmade compounds that have been widely used as refrigerants and in spray propellants and foam blowing.
Select the correct answer from the following statement:
A chemical responsible for ozone depletion.
Name or state the following:
The atom which reacts with oxygen to form ozone.
State the essential function performed by ozone at the higher levels of the atmosphere.
