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 : Law of conservation of mass holds good for nuclear reactions.
Reason : It states that energy can neither be created nor destroyed in a chemical reaction.
- 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 'D'. 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) ...
Law of conservation of mass does not hold good for nuclear reactions due to mass defect.
View all questions of this test
Law of conservation of mass states that matter can neither be created nor destroyed.
Most Upvoted Answer
Direction: In the following questions, a statement of assertion (A) ...
Assertion: Law of conservation of mass holds good for nuclear reactions.
Reason: It states that energy can neither be created nor destroyed in a chemical reaction.
The correct answer is option 'D', which states that Assertion (A) is false but reason (R) is true.
Explanation:
- Nuclear reactions involve changes in the nucleus of an atom, whereas chemical reactions involve changes in the electron arrangement of atoms.
- The Law of Conservation of Mass states that in a chemical reaction, the total mass of the reactants is equal to the total mass of the products. This means that mass is conserved during a chemical reaction.
- However, in a nuclear reaction, the total mass of the reactants may not be equal to the total mass of the products. This is due to the conversion of mass into energy according to Einstein's mass-energy equivalence principle (E=mc²).
- In nuclear reactions, a small amount of mass is converted into a large amount of energy. This is evident in processes like nuclear fission and nuclear fusion.
- Therefore, the Law of Conservation of Mass does not hold true for nuclear reactions. The total mass before and after a nuclear reaction may not be the same.
- However, the reason stated in the question is correct. The Law of Conservation of Energy, which states that energy can neither be created nor destroyed, holds true for both chemical and nuclear reactions.
- In both types of reactions, the total energy before and after the reaction remains constant. Energy can only change forms, but it cannot be created or destroyed.
- Therefore, the correct answer is option 'D' - Assertion (A) is false but reason (R) is true. The Law of Conservation of Mass does not hold good for nuclear reactions, but the Law of Conservation of Energy does.
Reason: It states that energy can neither be created nor destroyed in a chemical reaction.
The correct answer is option 'D', which states that Assertion (A) is false but reason (R) is true.
Explanation:
- Nuclear reactions involve changes in the nucleus of an atom, whereas chemical reactions involve changes in the electron arrangement of atoms.
- The Law of Conservation of Mass states that in a chemical reaction, the total mass of the reactants is equal to the total mass of the products. This means that mass is conserved during a chemical reaction.
- However, in a nuclear reaction, the total mass of the reactants may not be equal to the total mass of the products. This is due to the conversion of mass into energy according to Einstein's mass-energy equivalence principle (E=mc²).
- In nuclear reactions, a small amount of mass is converted into a large amount of energy. This is evident in processes like nuclear fission and nuclear fusion.
- Therefore, the Law of Conservation of Mass does not hold true for nuclear reactions. The total mass before and after a nuclear reaction may not be the same.
- However, the reason stated in the question is correct. The Law of Conservation of Energy, which states that energy can neither be created nor destroyed, holds true for both chemical and nuclear reactions.
- In both types of reactions, the total energy before and after the reaction remains constant. Energy can only change forms, but it cannot be created or destroyed.
- Therefore, the correct answer is option 'D' - Assertion (A) is false but reason (R) is true. The Law of Conservation of Mass does not hold good for nuclear reactions, but the Law of Conservation of Energy does.
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 : Law of conservation of mass holds good for nuclear reactions.Reason : It states that energy can neither be created nor destroyed in a chemical reaction.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 'D'. 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 : Law of conservation of mass holds good for nuclear reactions.Reason : It states that energy can neither be created nor destroyed in a chemical reaction.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 'D'. 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 : Law of conservation of mass holds good for nuclear reactions.Reason : It states that energy can neither be created nor destroyed in a chemical reaction.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 'D'. 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 : Law of conservation of mass holds good for nuclear reactions.Reason : It states that energy can neither be created nor destroyed in a chemical reaction.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 'D'. 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 : Law of conservation of mass holds good for nuclear reactions.Reason : It states that energy can neither be created nor destroyed in a chemical reaction.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 'D'. 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 : Law of conservation of mass holds good for nuclear reactions.Reason : It states that energy can neither be created nor destroyed in a chemical reaction.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 'D'. 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 : Law of conservation of mass holds good for nuclear reactions.Reason : It states that energy can neither be created nor destroyed in a chemical reaction.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 'D'. 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 : Law of conservation of mass holds good for nuclear reactions.Reason : It states that energy can neither be created nor destroyed in a chemical reaction.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 'D'. 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 : Law of conservation of mass holds good for nuclear reactions.Reason : It states that energy can neither be created nor destroyed in a chemical reaction.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 'D'. 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 : Law of conservation of mass holds good for nuclear reactions.Reason : It states that energy can neither be created nor destroyed in a chemical reaction.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 'D'. 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 : Law of conservation of mass holds good for nuclear reactions.Reason : It states that energy can neither be created nor destroyed in a chemical reaction.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 'D'. 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 : Law of conservation of mass holds good for nuclear reactions.Reason : It states that energy can neither be created nor destroyed in a chemical reaction.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 'D'. 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 : Law of conservation of mass holds good for nuclear reactions.Reason : It states that energy can neither be created nor destroyed in a chemical reaction.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 'D'. 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