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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 24 June 2022, Shift 1, Physics Q45

Question 45 of 90 in this shift, Physics question 15 of 30, Section A.

Nucleus A is having mass number 220 and its binding energy per nucleon is 5.6 MeV. It splits in two fragments 'B' and 'C' of mass numbers 105 and 115. The binding energy of nucleons in 'B' and 'C' is 6.4 MeV per nucleon. The energy Q released per fission will be :
  1. (1)0.8 MeV
  2. (2)275 MeV
  3. (3)220 MeV
  4. (4)176 MeVOfficial answer

Official answer

Option 4

NTA final key (2022 Session 1).

Chapter
Nuclei
Topic
Nuclear Binding Energy
Idea tested
Q-Value Calculation

Same idea in other shifts

Asked 2× in all
  1. 12 Apr 2023, Shift 1 · Q60A common example of alpha decay is 92238U⟶ 90234Th+2He4+Q^{238}_{92}\mathrm{U} \longrightarrow\, ^{234}_{90}\mathrm{Th} + {}_{2}\mathrm{He}^{4} + Q Given :…EasyNumerical value

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.