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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
You have been selected to talk on 'ozone layer and its protection" in the school assembly on 'Environment Day.'
(a) Why should ozone layer be protected to save the environment?
(b) List any two ways that you would stress in your talk to bring in awareness amongst your fellow friends that would also help in protection of ozone layer as well as the environment.
The prime source of chlorofluorocarbons is ______.
Give scientific reasons:
Ozone present in the stratosphere is called as “good ozone”.
State two effects of ozone depletion.
‘There is a hole in the ozone layer’. What do you understand by this?
Fill in the Blanks:
______ is manmade compounds that have been widely used as refrigerants and in spray propellants and foam blowing.
Ozone is abundant in this layer. Ozone heats this layer as it absorbs from incoming ultraviolet radiation from the sun:
Give balanced equation for the following conversion [one or two steps].
Oxygen to ozone gas by photolysis.
Which of the following radiations is responsible for the conversion of atmospheric oxygen to ozone?
______ was signed in 1987 to control emission of ozone depleting substances.
