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Question
Assertion (A): Oxygen plays a key role in the troposphere.
Reason (R): Troposphere is not responsible for all biological activities.
Options
Both (A) and R are correct and (R) is the correct explanation of (A)
Both (A) and (R) are correct and (R) is not the correct explanation of (A)
Both (A) and (R) are not correct
(A) is correct but (R) is not correct
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Solution
(A) is correct but (R) is not correct
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RELATED QUESTIONS
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 ______.
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On the basis of chemical reactions involved, explain how do CFC’s cause depletion of ozone layer in stratosphere?
What do you mean by ozone hole?
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?
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.
