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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 (A): The binding energy per nucleon, for nuclei with mass number (A) > 56 decreases with A.
Reason (R): Nuclear force is weak in heavier nuclei.
  • a)
    Both A and R are true and R is the correct explanation of A
  • b)
    Both A and R are true but R is NOT the correct explanation of A
  • c)
    A is true but R is false
  • d)
    A is false and R is true
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
Directions : In the following questions, A statement of Assertion (A)...
From the binding energy per nucleon vs. mass number, we find that binding energy per nucleon is maximum at A=56. After that, binding energy per nucleon decreases as A increases. So, the assertion is true.
Nuclear force remains the same for all nuclei. Hence the reason is false.
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Most Upvoted Answer
Directions : In the following questions, A statement of Assertion (A)...
Explanation:
Assertion (A) and Reason (R) are both related to the binding energy per nucleon in nuclei with a mass number greater than 56.

Assertion (A): The binding energy per nucleon, for nuclei with mass number (A) > 56 decreases with A.
- This statement is true. As the mass number of nuclei increases, the binding energy per nucleon decreases. This is due to the fact that the nuclear force, which helps to hold the nucleus together, is not strong enough to overcome the electrostatic repulsion between protons in heavier nuclei. This leads to a decrease in the binding energy per nucleon.

Reason (R): Nuclear force is weak in heavier nuclei.
- This statement is false. The nuclear force is actually strong in heavier nuclei. It is this strong nuclear force that overcomes the electrostatic repulsion between protons and holds the nucleus together. However, in heavier nuclei, the electrostatic repulsion becomes more dominant, leading to a decrease in the binding energy per nucleon.
Therefore, the correct answer is:
c) A is true but R is false.
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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 (A): The binding energy per nucleon, for nuclei with mass number (A) > 56 decreases with A.Reason (R): Nuclear force is weak in heavier nuclei.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer?
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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 (A): The binding energy per nucleon, for nuclei with mass number (A) > 56 decreases with A.Reason (R): Nuclear force is weak in heavier nuclei.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 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 (A): The binding energy per nucleon, for nuclei with mass number (A) > 56 decreases with A.Reason (R): Nuclear force is weak in heavier nuclei.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 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 (A): The binding energy per nucleon, for nuclei with mass number (A) > 56 decreases with A.Reason (R): Nuclear force is weak in heavier nuclei.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'C'. Can you explain this answer?.
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