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Nuclei

Previous year questions with solutions · 2025 – 2026

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19Questions
18Papers covered
2.74% ↑36.8%Weightage in 2026
’25
’26
Year-wise statistics questions · papers · average per paper · weightage
YearQuestionsPapersAvg / paperWeightage
202613190.682.74% ↑36.8%
20256120.52.00%

2 questions · newest paper first

1

The energy released when 717.13 kg of 37Li is converted into 24He by proton bombardment is 1032 eV. The value of is . (Nearest integer) (Mass of 37Li=7.0183 u, mass of 24He=4.004 u, mass of proton =1.008 u and 1 u =931 MeV/c2 and Avogadro number =6.0 1023)

JEE Main 2026 (Online) 6th April Morning Shift
2

The average energy released per fission for the nucleus of 23592U is 190 MeV. When all the atoms of 47 g pure 23592U undergo fission process, the energy released is 1023 MeV. The value of is . (Avogadro Number = 6 1023 per mole)

JEE Main 2026 (Online) 23rd January Evening Shift