Ozone layer — task. Science CBSE Homework Assignments, Class 10.

Section A: Choose the correct answer for the given question from the options.

20. Assertion (A): Ozone layer protects the surface of the Earth from harmful UV radiations.
Reason (R): Chlorofluorocarbons (CFCs) are responsible for depletion of the ozone layer.

Both Assertion (A) and Reason (R) are the true but Reason (R) is not a correct explanation of Assertion (A).
Assertion (A) is true and Reason (R) is false.
Both Assertion (A) and Reason (R) are the true and Reason (R) is a correct explanation of Assertion (A).
Assertion (A) is false and Reason (R) is true.

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1. Ozone layer

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