Assertion: Nuclear binding energy per nucleon is in the order 94Be > 73Li >42He.
Reason: Binding energy per nucleon increases linearly with difference in number of neutrons and protons.
(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
(b) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
(c) If the Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.
(e) If the Assertion is incorrect but the Reason is correct.
(d) If both the Assertion and Reason are incorrect.
Explanation:
Binding energy depends on the mass defect (mass lost when the constituent protons and neutrons combine to form nucleus). Binding energy is direct measurement of stability of nucleus Higher the binding energy (means high loss of energy during formation of nucleus from protons and neutrons) per nucleon, higher is stability of the nucleus.
The order of binding energy is
42He> 73Li > 94Be.