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प्रश्न
Which is considered to be the earth’s protective umbrella? Why?
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उत्तर
At high altitudes to the atmosphere consists of a layer of ozone (O3) which acts as an umbrella or shield for harmful UV radiations. It protects us from harmful effects such as skin cancer. UV radiation can convert molecular oxygen into ozone as shown in the following reaction.
\[\ce{O2(g) ->[uv] O(g) + O(g)}\]
\[\ce{O(g) + O2(g) ->[uv] O3(g)}\]
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संबंधित प्रश्न
What are the reactions involved for ozone layer depletion in the stratosphere?
The gaseous envelope around the earth is known as atmosphere. The region lying between an altitudes of 11 – 50 km is _______.
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?
On the basis of chemical reactions involved, explain how do chlorofluorocarbons cause thinning of ozone layer in stratosphere.
How is ozone produced in stratosphere?
Ozone is a gas heavier than air. Why does ozone layer not settle down near the earth?
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.
Polar stratospheric clouds facilitate the formation of ______.
