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Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : CFCs deplete the ozone layer.
Reason : CFCs are used as refrigerants and in fire extinguishers.
- a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
- b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
- c)Assertion (A) is true but reason (R) is false.
- d)Assertion (A) is false but reason (R) is true.
- e)Both Assertion and Reason are false.
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Directions: In the following questions, a statement of assertion (A) i...
Understanding the Assertion and Reason
The assertion states that "CFCs deplete the ozone layer." This is indeed true. Chlorofluorocarbons (CFCs) are chemicals that have been widely used in various applications, particularly as refrigerants in air conditioning systems and in fire extinguishers. When released into the atmosphere, CFCs rise up and eventually reach the stratosphere, where they break down ozone molecules, leading to the depletion of the ozone layer.
Role of CFCs in Ozone Layer Depletion
- CFCs release chlorine atoms when they are exposed to ultraviolet (UV) radiation in the stratosphere.
- These chlorine atoms react with ozone (O3) molecules, resulting in the breakdown of ozone into oxygen (O2).
- The depletion of the ozone layer increases UV radiation reaching the Earth's surface, leading to harmful effects like skin cancer and cataracts.
Connection Between Assertion and Reason
The reason provided states that "CFCs are used as refrigerants and in fire extinguishers." This statement is also true as CFCs have historically been used in these applications. However, while the reason accurately describes the use of CFCs, it does not explain why they deplete the ozone layer. Therefore, while both statements are true, the reason does not provide a valid explanation for the assertion.
Conclusion
Given that both the assertion and the reason are true, but the reason does not correctly explain the assertion, the correct choice is:
- Option (b): Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
The assertion states that "CFCs deplete the ozone layer." This is indeed true. Chlorofluorocarbons (CFCs) are chemicals that have been widely used in various applications, particularly as refrigerants in air conditioning systems and in fire extinguishers. When released into the atmosphere, CFCs rise up and eventually reach the stratosphere, where they break down ozone molecules, leading to the depletion of the ozone layer.
Role of CFCs in Ozone Layer Depletion
- CFCs release chlorine atoms when they are exposed to ultraviolet (UV) radiation in the stratosphere.
- These chlorine atoms react with ozone (O3) molecules, resulting in the breakdown of ozone into oxygen (O2).
- The depletion of the ozone layer increases UV radiation reaching the Earth's surface, leading to harmful effects like skin cancer and cataracts.
Connection Between Assertion and Reason
The reason provided states that "CFCs are used as refrigerants and in fire extinguishers." This statement is also true as CFCs have historically been used in these applications. However, while the reason accurately describes the use of CFCs, it does not explain why they deplete the ozone layer. Therefore, while both statements are true, the reason does not provide a valid explanation for the assertion.
Conclusion
Given that both the assertion and the reason are true, but the reason does not correctly explain the assertion, the correct choice is:
- Option (b): Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
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Directions: In the following questions, a statement of assertion (A) i...
Answer:
Chlorofluorocarbons (CFCs ), which are used as refrigerants and in fire extinguishers , deplete the ozone layer by rising into the stratosphere and releasing chlorine atoms which react with ozone.
Thus,
- Assertion is true.
- Reason is true.
- Reason is the correct explanation of assertion.
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Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : CFCs deplete the ozone layer.Reason : CFCs are used as refrigerants and in fire extinguishers.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : CFCs deplete the ozone layer.Reason : CFCs are used as refrigerants and in fire extinguishers.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : CFCs deplete the ozone layer.Reason : CFCs are used as refrigerants and in fire extinguishers.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer?.
Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : CFCs deplete the ozone layer.Reason : CFCs are used as refrigerants and in fire extinguishers.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : CFCs deplete the ozone layer.Reason : CFCs are used as refrigerants and in fire extinguishers.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : CFCs deplete the ozone layer.Reason : CFCs are used as refrigerants and in fire extinguishers.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer?.
Solutions for Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : CFCs deplete the ozone layer.Reason : CFCs are used as refrigerants and in fire extinguishers.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 10.
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Here you can find the meaning of Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : CFCs deplete the ozone layer.Reason : CFCs are used as refrigerants and in fire extinguishers.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : CFCs deplete the ozone layer.Reason : CFCs are used as refrigerants and in fire extinguishers.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer?, a detailed solution for Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : CFCs deplete the ozone layer.Reason : CFCs are used as refrigerants and in fire extinguishers.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : CFCs deplete the ozone layer.Reason : CFCs are used as refrigerants and in fire extinguishers.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : CFCs deplete the ozone layer.Reason : CFCs are used as refrigerants and in fire extinguishers.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice Class 10 tests.
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