If the binding energies of a deuteron and an alpha particle are ${\rm{1}}{\rm{.125}}\,\,{\rm{MeV}}$ and ${\rm{7}}{\rm{.2}}\,\,{\rm{MeV}}$, respectively , then the more stable of the two is

Sometimes deuteron and Sometimes Alpha-particle

NEET UG PHYSICS MCQ: NUCLEI

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If the binding energies of a deuteron and an alpha particle are

\mathrm{1}\mathrm{.125}\,\,\mathrm{MeV}

and

\mathrm{7}\mathrm{.2}\,\,\mathrm{MeV}

, respectively , then the more stable of the two is

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Correct option: B

Alpha-particle

Option B (Alpha-particle) is correct because the binding energy per nucleon is higher for the alpha particle (7.2 MeV / 4 nucleons = 1.8 MeV/nucleon) than for the deuteron (1.125 MeV / 2 nucleons = 0.5625 MeV/nucleon).

NEET UG PHYSICS MCQ: NUCLEI

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