JEE Main 2023 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 8 April 2023, Shift 1, Physics Q55

Question 55 of 90 in this shift, Physics question 25 of 30, Section B.

A nucleus with mass number

242

and binding energy per nucleon as

7.6\ \mathrm{MeV}

breaks into two fragment each with mass number

121

. If each fragment nucleus has binding energy per nucleon as

8.1\ \mathrm{MeV}

, the total gain in binding energy is ________ MeV.

Official answer

121

NTA final key.

Chapter: Nuclei
Topic: Nuclear Binding Energy
Idea tested: Binding Energy per Nucleon

Same idea in other shifts

Asked 6× in all

2 Apr 2026, Shift 2 · Q44The binding energy per nucleon of $\frac{209}{83}Bi$ isMediumSingle correct
2 Apr 2025, Shift 2 · Q38Energy released when two deuterons ( $_1\mathrm{H}^2$ ) fuse to form a helium nucleus ( $_2\mathrm{He}^4$ ) is : (Given : Binding energy per…EasySingle correct
27 Jan 2024, Shift 1 · Q60In a nuclear fission process, a high mass nuclide (A $\approx$ 236) with binding energy 7.6 MeV/Nucleon dissociated into middle mass…EasyNumerical value
26 Jul 2022, Shift 2 · Q54Two lighter nuclei combine to form a comparatively heavier nucleus by the relation given below : ${}^{2}_{1}X + {}^{2}_{1}X = {}^{4}_{2}Y$ …MediumNumerical value
4 Sep 2020, Shift 2 · Q18Find the Binding energy per neucleon for $^{120}_{50}\mathrm{Sn}$ . Mass of proton $m_p = 1.00783$ U, mass of neutron $m_n = 1.00867$ U and…EasySingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.