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Physics · 2025 · 1 mark
CBSE 2025 · Region 5 · Set 1 · Q14
Assertion (A): During formation of a nucleus, the mass defect produced is the source of the binding energy of the nucleus. Reason ( R ): For all…
Assertion (A) : During formation of a nucleus, the mass defect produced is the source of the binding energy of the nucleus. Reason ( $\displaystyle R$ ) : For all nuclei, the value of binding energy per nucleon increases with mass number.
Official answer
(C)
Assertion (A) is true, but Reason (R) is false.
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CBSE Class 12 Physics past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.