Class 9 Exam > Class 9 Questions > Direction : In the following questions, a st...
Start Learning for Free
Direction : In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : Atomicity of oxygen is 2.
Reason : 1 mole of an element contains 6.023 x1023 atoms.
- 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.
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Direction : In the following questions, a statement of assertion (A) ...
Number of atoms present in a molecule of a gaseous element is called atomicity. e.g., O2 has two atoms and hence, its atomicity is 2.
View all questions of this test
Most Upvoted Answer
Direction : In the following questions, a statement of assertion (A) ...
Assertion (A): Atomicity of oxygen is 2.
Reason (R): 1 mole of an element contains 6.023 x 10^23 atoms.
The correct answer is option 'B' - Both assertion (A) and reason (R) are true, but reason (R) is not the correct explanation of assertion (A).
Explanation:
Atomicity of Oxygen:
- Atomicity refers to the number of atoms present in a molecule of an element.
- Oxygen (O) is a diatomic molecule, which means it exists as O2 in its natural state.
- Therefore, the atomicity of oxygen is 2, as it consists of two oxygen atoms bonded together.
Mole Concept:
- The mole concept is a fundamental concept in chemistry that helps to relate the mass of a substance to the number of particles (atoms, molecules, ions) it contains.
- According to Avogadro's law, 1 mole of any substance contains 6.023 x 10^23 particles. This number is known as Avogadro's number or the Avogadro constant.
Explanation of the Reason:
- The reason given is correct but it does not provide the correct explanation for the atomicity of oxygen.
- The reason states that 1 mole of an element contains 6.023 x 10^23 atoms, which is true. It means that if we have 1 mole of any element, it will contain Avogadro's number of atoms.
- However, this statement does not directly explain why the atomicity of oxygen is 2.
- The atomicity of oxygen is based on the fact that oxygen exists as O2, a diatomic molecule, in its natural state. This means that in 1 molecule of oxygen, there are 2 oxygen atoms bonded together.
- The reason given does not provide this specific information about the atomicity of oxygen.
Therefore, both the assertion and reason are true, but the reason does not correctly explain the assertion. Hence, the correct answer is option 'B'.
Reason (R): 1 mole of an element contains 6.023 x 10^23 atoms.
The correct answer is option 'B' - Both assertion (A) and reason (R) are true, but reason (R) is not the correct explanation of assertion (A).
Explanation:
Atomicity of Oxygen:
- Atomicity refers to the number of atoms present in a molecule of an element.
- Oxygen (O) is a diatomic molecule, which means it exists as O2 in its natural state.
- Therefore, the atomicity of oxygen is 2, as it consists of two oxygen atoms bonded together.
Mole Concept:
- The mole concept is a fundamental concept in chemistry that helps to relate the mass of a substance to the number of particles (atoms, molecules, ions) it contains.
- According to Avogadro's law, 1 mole of any substance contains 6.023 x 10^23 particles. This number is known as Avogadro's number or the Avogadro constant.
Explanation of the Reason:
- The reason given is correct but it does not provide the correct explanation for the atomicity of oxygen.
- The reason states that 1 mole of an element contains 6.023 x 10^23 atoms, which is true. It means that if we have 1 mole of any element, it will contain Avogadro's number of atoms.
- However, this statement does not directly explain why the atomicity of oxygen is 2.
- The atomicity of oxygen is based on the fact that oxygen exists as O2, a diatomic molecule, in its natural state. This means that in 1 molecule of oxygen, there are 2 oxygen atoms bonded together.
- The reason given does not provide this specific information about the atomicity of oxygen.
Therefore, both the assertion and reason are true, but the reason does not correctly explain the assertion. Hence, the correct answer is option 'B'.
Free Test
FREE
| Start Free Test |
Community Answer
Direction : In the following questions, a statement of assertion (A) ...
Both are different sentences...not related
Attention Class 9 Students!
To make sure you are not studying endlessly, EduRev has designed Class 9 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 9.
|
Explore Courses for Class 9 exam
|
|
Similar Class 9 Doubts
Top Courses for Class 9View all
Direction : In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Atomicity of oxygen is 2.Reason : 1 mole of an element contains 6.023 x1023 atoms.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.Correct answer is option 'B'. Can you explain this answer?
Question Description
Direction : In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Atomicity of oxygen is 2.Reason : 1 mole of an element contains 6.023 x1023 atoms.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.Correct answer is option 'B'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Direction : In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Atomicity of oxygen is 2.Reason : 1 mole of an element contains 6.023 x1023 atoms.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.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction : In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Atomicity of oxygen is 2.Reason : 1 mole of an element contains 6.023 x1023 atoms.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.Correct answer is option 'B'. Can you explain this answer?.
Direction : In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Atomicity of oxygen is 2.Reason : 1 mole of an element contains 6.023 x1023 atoms.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.Correct answer is option 'B'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Direction : In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Atomicity of oxygen is 2.Reason : 1 mole of an element contains 6.023 x1023 atoms.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.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction : In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Atomicity of oxygen is 2.Reason : 1 mole of an element contains 6.023 x1023 atoms.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.Correct answer is option 'B'. Can you explain this answer?.
Solutions for Direction : In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Atomicity of oxygen is 2.Reason : 1 mole of an element contains 6.023 x1023 atoms.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.Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9.
Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.
Here you can find the meaning of Direction : In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Atomicity of oxygen is 2.Reason : 1 mole of an element contains 6.023 x1023 atoms.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.Correct answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Direction : In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Atomicity of oxygen is 2.Reason : 1 mole of an element contains 6.023 x1023 atoms.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.Correct answer is option 'B'. Can you explain this answer?, a detailed solution for Direction : In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Atomicity of oxygen is 2.Reason : 1 mole of an element contains 6.023 x1023 atoms.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.Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of Direction : In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Atomicity of oxygen is 2.Reason : 1 mole of an element contains 6.023 x1023 atoms.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.Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Direction : In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Atomicity of oxygen is 2.Reason : 1 mole of an element contains 6.023 x1023 atoms.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.Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice Class 9 tests.
|
|
Explore Courses for Class 9 exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup