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Consider the following statements:
Assertion (A): The poisonous Ozone does not exist very near to the Earth’s surface.
Reason (R): It is unstable near the Earth’s surface.
In the context of the above statements, which of these is/are true?
- a)A and R both are true, and R is the correct explanation for A.
- b)A and R both are true, and R is not the correct explanation for A.
- c)A is correct, R is incorrect.
- d)A and R both are incorrect.
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Consider the following statements: Assertion (A): The poisonous Ozone...
- Elemental oxygen is normally found in the form of a diatomic molecule. However, in the upper reaches of the atmosphere, a molecule containing three atoms of oxygen is found. This would mean a formula of and this is called ozone.
- Unlike the normal diatomic molecule of oxygen, ozone is poisonous and we are lucky that it is not stable nearer to the Earth’s surface. But it performs an essential function where it is found.
- It absorbs harmful radiations from the Sun. This prevents those harmful radiations from reaching the surface of the Earth where they may damage many forms of life.
Most Upvoted Answer
Consider the following statements: Assertion (A): The poisonous Ozone...
Assertion and Reasoning in Science
In competitive exams like UPSC, Assertion and Reasoning questions are frequently asked. These questions require the candidate to identify whether the given Assertion (A) and Reasoning (R) statements are true or false and whether the Reasoning statement is the correct explanation for the Assertion or not. Let's understand this through the given example.
The given Assertion is: The poisonous Ozone does not exist very near to the Earth’s surface.
The given Reasoning is: It is unstable near the Earth’s surface.
Explanation
First, we need to understand what is Ozone. Ozone is a gas that occurs both in the Earth's upper atmosphere and at ground level. In the upper atmosphere, ozone protects life on Earth from the sun's harmful ultraviolet (UV) rays. However, at ground level, ozone is harmful to human health and the environment.
Assertion (A): The poisonous Ozone does not exist very near to the Earth’s surface.
This Assertion statement is true. The ozone that is harmful to human health and the environment is found in the lower atmosphere or the troposphere. The troposphere extends from the Earth's surface to about 10-15 km up. The Ozone in the troposphere is called ground-level ozone, and it is formed by the reaction of pollutants from human activities like vehicle exhaust, industrial emissions, and chemical solvents. Ground-level ozone is harmful to human health as it can cause respiratory problems, reduce lung function, and aggravate asthma.
Reason (R): It is unstable near the Earth’s surface.
This Reasoning statement is also true. Ozone is unstable near the Earth's surface because it reacts quickly with other chemicals. Ground-level ozone is formed by the reaction of pollutants in the presence of sunlight. Hence, it is often found in urban areas with high traffic and industrial activities where the concentration of pollutants is high.
Therefore, both the Assertion and Reasoning statements are true, and the Reasoning statement is the correct explanation for the Assertion statement. Hence, option (A) is the correct answer.
In competitive exams like UPSC, Assertion and Reasoning questions are frequently asked. These questions require the candidate to identify whether the given Assertion (A) and Reasoning (R) statements are true or false and whether the Reasoning statement is the correct explanation for the Assertion or not. Let's understand this through the given example.
The given Assertion is: The poisonous Ozone does not exist very near to the Earth’s surface.
The given Reasoning is: It is unstable near the Earth’s surface.
Explanation
First, we need to understand what is Ozone. Ozone is a gas that occurs both in the Earth's upper atmosphere and at ground level. In the upper atmosphere, ozone protects life on Earth from the sun's harmful ultraviolet (UV) rays. However, at ground level, ozone is harmful to human health and the environment.
Assertion (A): The poisonous Ozone does not exist very near to the Earth’s surface.
This Assertion statement is true. The ozone that is harmful to human health and the environment is found in the lower atmosphere or the troposphere. The troposphere extends from the Earth's surface to about 10-15 km up. The Ozone in the troposphere is called ground-level ozone, and it is formed by the reaction of pollutants from human activities like vehicle exhaust, industrial emissions, and chemical solvents. Ground-level ozone is harmful to human health as it can cause respiratory problems, reduce lung function, and aggravate asthma.
Reason (R): It is unstable near the Earth’s surface.
This Reasoning statement is also true. Ozone is unstable near the Earth's surface because it reacts quickly with other chemicals. Ground-level ozone is formed by the reaction of pollutants in the presence of sunlight. Hence, it is often found in urban areas with high traffic and industrial activities where the concentration of pollutants is high.
Therefore, both the Assertion and Reasoning statements are true, and the Reasoning statement is the correct explanation for the Assertion statement. Hence, option (A) is the correct answer.
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Consider the following statements: Assertion (A): The poisonous Ozone does not exist very near to the Earth’s surface.Reason (R): It is unstable near the Earth’s surface.In the context of the above statements, which of these is/are true? a) A and R both are true, and R is the correct explanation for A.b) A and R both are true, and R is not the correct explanation for A.c) A is correct, R is incorrect.d) A and R both are incorrect.Correct answer is option 'A'. Can you explain this answer?
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Consider the following statements: Assertion (A): The poisonous Ozone does not exist very near to the Earth’s surface.Reason (R): It is unstable near the Earth’s surface.In the context of the above statements, which of these is/are true? a) A and R both are true, and R is the correct explanation for A.b) A and R both are true, and R is not the correct explanation for A.c) A is correct, R is incorrect.d) A and R both are incorrect.Correct answer is option 'A'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Consider the following statements: Assertion (A): The poisonous Ozone does not exist very near to the Earth’s surface.Reason (R): It is unstable near the Earth’s surface.In the context of the above statements, which of these is/are true? a) A and R both are true, and R is the correct explanation for A.b) A and R both are true, and R is not the correct explanation for A.c) A is correct, R is incorrect.d) A and R both are incorrect.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements: Assertion (A): The poisonous Ozone does not exist very near to the Earth’s surface.Reason (R): It is unstable near the Earth’s surface.In the context of the above statements, which of these is/are true? a) A and R both are true, and R is the correct explanation for A.b) A and R both are true, and R is not the correct explanation for A.c) A is correct, R is incorrect.d) A and R both are incorrect.Correct answer is option 'A'. Can you explain this answer?.
Consider the following statements: Assertion (A): The poisonous Ozone does not exist very near to the Earth’s surface.Reason (R): It is unstable near the Earth’s surface.In the context of the above statements, which of these is/are true? a) A and R both are true, and R is the correct explanation for A.b) A and R both are true, and R is not the correct explanation for A.c) A is correct, R is incorrect.d) A and R both are incorrect.Correct answer is option 'A'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Consider the following statements: Assertion (A): The poisonous Ozone does not exist very near to the Earth’s surface.Reason (R): It is unstable near the Earth’s surface.In the context of the above statements, which of these is/are true? a) A and R both are true, and R is the correct explanation for A.b) A and R both are true, and R is not the correct explanation for A.c) A is correct, R is incorrect.d) A and R both are incorrect.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements: Assertion (A): The poisonous Ozone does not exist very near to the Earth’s surface.Reason (R): It is unstable near the Earth’s surface.In the context of the above statements, which of these is/are true? a) A and R both are true, and R is the correct explanation for A.b) A and R both are true, and R is not the correct explanation for A.c) A is correct, R is incorrect.d) A and R both are incorrect.Correct answer is option 'A'. Can you explain this answer?.
Solutions for Consider the following statements: Assertion (A): The poisonous Ozone does not exist very near to the Earth’s surface.Reason (R): It is unstable near the Earth’s surface.In the context of the above statements, which of these is/are true? a) A and R both are true, and R is the correct explanation for A.b) A and R both are true, and R is not the correct explanation for A.c) A is correct, R is incorrect.d) A and R both are incorrect.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for UPSC.
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Consider the following statements: Assertion (A): The poisonous Ozone does not exist very near to the Earth’s surface.Reason (R): It is unstable near the Earth’s surface.In the context of the above statements, which of these is/are true? a) A and R both are true, and R is the correct explanation for A.b) A and R both are true, and R is not the correct explanation for A.c) A is correct, R is incorrect.d) A and R both are incorrect.Correct answer is option 'A'. Can you explain this answer?, a detailed solution for Consider the following statements: Assertion (A): The poisonous Ozone does not exist very near to the Earth’s surface.Reason (R): It is unstable near the Earth’s surface.In the context of the above statements, which of these is/are true? a) A and R both are true, and R is the correct explanation for A.b) A and R both are true, and R is not the correct explanation for A.c) A is correct, R is incorrect.d) A and R both are incorrect.Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of Consider the following statements: Assertion (A): The poisonous Ozone does not exist very near to the Earth’s surface.Reason (R): It is unstable near the Earth’s surface.In the context of the above statements, which of these is/are true? a) A and R both are true, and R is the correct explanation for A.b) A and R both are true, and R is not the correct explanation for A.c) A is correct, R is incorrect.d) A and R both are incorrect.Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Consider the following statements: Assertion (A): The poisonous Ozone does not exist very near to the Earth’s surface.Reason (R): It is unstable near the Earth’s surface.In the context of the above statements, which of these is/are true? a) A and R both are true, and R is the correct explanation for A.b) A and R both are true, and R is not the correct explanation for A.c) A is correct, R is incorrect.d) A and R both are incorrect.Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice UPSC tests.
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