JEE Main 2022 · 24 Jun · Shift 1 · Physics Q45

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PhysicsSingle correct+4 / -1Question 45 of 90

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 :

0.8 MeV

275 MeV

220 MeV

176 MeV

Answer and worked solution

Official answer: D

Binding energies. Before: $220\times5.6=1232$ MeV. After: $(105+115)\times6.4=1408$ MeV.

Energy released. $Q=1408-1232=176$ MeV.

(D)

Topics:Mass defect and binding energy Nuclear fission and fusion

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JEE Main 2022 · 24 Jun · Shift 1, Physics question 45