Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: Presently, the global atmosphere is warming up. Reason: The depletion of stratospheric ozone layer has resulted in increase in ultraviolet radiations reaching the earth.A) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
C) If Assertion is true statement but Reason is false.
D) If both Assertion and Reason are false statements.
Correct Answer: B
Solution :
The increase in the global mean temperature is referred to as global warming. The main reason for global warming is greenhouse effect. Ozone layer of stratosphere is continuously depleted due to increase in ozone depleting substances such as CFCs, \[C{{H}_{4}},\,{{H}_{2}}O\] etc., in atmosphere. The thinning of the ozone layer results in an increase in the UV-radiation reaching the earth surface.
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