AIIMS 2019 Physics Nuclear Stability Assertion Reason Question
Assertion: For an element generally N ≥ Z (N=number of neutrons, Z= atomic number) Reason: Neutrons always experience attractive nuclear force.
If both assertion and reason are true and reason is correct explanation of assertion.
If both assertion and reason are true and reason is not correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
The assertion that for an element, the number of neutrons (N) is generally greater than or equal to the atomic number (Z) is true, as heavier elements tend to have more neutrons to stabilize the nucleus against repulsive forces between protons. However, the reason provided, stating that neutrons always experience attractive nuclear force, is misleading; while neutrons do contribute to nuclear stability, they do not experience the same repulsive forces as protons, making the explanation insufficient. Options A and C are incorrect because they misinterpret the relationship between the assertion and reason, while option D is incorrect as both statements contain elements of truth.
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