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Saturday, 31 October

JEE Main 2023 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 12 April 2023, Shift 1, Physics Q60

Question 60 of 90 in this shift, Physics question 30 of 30, Section B.

A 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 : 92238U=238.05060 u^{238}_{92}\mathrm{U} = 238.05060\,\mathrm{u}, 90234Th=234.04360 u^{234}_{90}\mathrm{Th} = 234.04360\,\mathrm{u}, 24He=4.00260 u^{4}_{2}\mathrm{He} = 4.00260\,\mathrm{u} and 1 u=931.5 MeVc21\,\mathrm{u} = 931.5\,\frac{\mathrm{MeV}}{c^2} The energy released (Q) during the alpha decay of 92238U^{238}_{92}\mathrm{U} is ____ MeV

Official answer

4

NTA final key.

Chapter
Nuclei

Same idea in other shifts

Asked 2× in all
  1. 24 Jun 2022, Shift 1 · Q45Nucleus 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…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.