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Question: Answered & Verified by Expert
Assertion: Ozone is destroyed by CFCs in the upper stratosphere.
Reason: Ozone holes increase the amount of UV radiation reaching the earth.
ChemistryEnvironmental ChemistryJEE MainJEE Main 2019 (08 Apr Shift 1)
Options:
  • A Assertion and reason are correct, but the reason is not the explanation for the assertion.
  • B The assertion is false, but the reason is correct.
  • C Assertion and reason are incorrect.
  • D Assertion and reason are both correct, and the reason is the correct explanation for the assertion.
Solution:
2604 Upvotes Verified Answer
The correct answer is: Assertion and reason are correct, but the reason is not the explanation for the assertion.

When CFCs react with ozone, then it breaks the molecule of ozone gas which results in ozone layer depletion. Ozone layer protect us from harmful ultraviolet (UV) radiations coming from the sun. Thus, ozone holes increase the amount of UV radiation reaching the earth.

The upper stratosphere consists of ozone O3, which protect us from harmful ultraviolet UV radiations coming from sun.

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