PYQSidePowered byPrepblink ExamsMy practice

Nuclei

JEE Main 2024 (Online) 8th April Evening ShiftMCQEasy📈 Topic in 26% papers+4−1
Ques. 1JEE Main 2024, 8 April (Evening Shift)

If M0 is the mass of isotope 125B, Mp and Mn are the masses of proton and neutron, then nuclear binding energy of isotope is:

  1. (5Mp + 7Mn - M0)C2
  2. (M0 - 5Mp - 7Mn)C2
  3. (M0 - 5Mp)C2
  4. (M0 - 12Mn)C2

Answer

(1) (5Mp + 7Mn - M0)C2

Solution

125B: protons = 5, neutrons = 12 - 5 = 7

Mass defect m = (5Mp + 7Mn) - M0 (positive: nucleus is lighter than its free nucleons)

binding energy = m c2

B.E. = (5Mp + 7Mn - M0)C2

(2): the negative of the binding energy, so (2) is wrong.

(3): the 7 neutrons are left out, so (3) is wrong.

(4): the 5 protons are left out, so (4) is wrong.

Answer: (1)

Keep practising — Nuclei

Ques. 2JEE Main 2024, 8 April (Evening Shift)

In a hypothetical fission reaction 92X236 56Y141 + 36Z92 + 3R The identity of emitted particles (R) is :

  1. Proton
  2. Neutron
  3. Electron
  4. -radiations
Ques. 3JEE Main 2024, 5 April (Morning Shift)

If three helium nuclei combine to form a carbon nucleus then the energy released in this reaction is 10-2 MeV. (Given 1 u = 931 MeV/c2, atomic mass of helium = 4.002603 u)

Ques. 4JEE Main 2024, 4 April (Morning Shift)

Which of the following nuclear fragments corresponding to nuclear fission between neutron (01n ) and uranium isotope (92235U ) is correct :

  1. 56140Xe+3894Sr+301n
  2. 51153Sb+4199Nb+301n
  3. 56144Ba+3689Kr+401n
  4. 56144Ba+3689Kr+301n
Ques. 5JEE Main 2024, 4 April (Evening Shift)

The disintegration energy Q for the nuclear fission of 235U 140Ce + 94Zr + n is MeV. Given atomic masses of 235U : 235.0439 u; 140Ce : 139.9054 u, 94Zr : 93.9063 u; n : 1.0086 u, Value of c2 = 931 MeV/u.

Ques. 6JEE Main 2024, 1 February (Morning Shift)

The radius of a nucleus of mass number 64 is 4.8 fermi. Then the mass number of another nucleus having radius of 4 fermi is 1000x, where x is .

Ques. 7JEE Main 2024, 1 February (Evening Shift)

From the statements given below : Choose the correct answer from the options given below :

  1. (B), (C), (D), (E) only
  2. (A), (C), (D), (E) only
  3. (A), (B), (C), (E) only
  4. (A), (B), (C), (D) only
Ques. 8JEE Main 2024, 31 January (Morning Shift)

The mass defect in a particular reaction is 0.4 g. The amount of energy liberated is n 107 kWh, where n= . (speed of light =3 108 m/s)

Ques. 9JEE Main 2024, 31 January (Evening Shift)

The mass number of nucleus having radius equal to half of the radius of nucleus with mass number 192 is :

  1. 32
  2. 24
  3. 20
  4. 40
Ques. 10JEE Main 2024, 31 January (Evening Shift)

A nucleus has mass number A1 and volume V1. Another nucleus has mass number A2 and Volume V2. If relation between mass number is A2=4A1, then V2V1= .

Ques. 11JEE Main 2024, 30 January (Evening Shift)

In a nuclear fission reaction of an isotope of mass M, three similar daughter nuclei of same mass are formed. The speed of a daughter nucleus in terms of mass defect M will be :

  1. c 3 MM
  2. Mc23
  3. c 2 MM
  4. 2c MM

All Nuclei PYQs →

PDFDownload Nuclei PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All JEE Main Physics chapters
Class 11Units and MeasurementsMotion in a Straight LineMotion in a PlaneLaws of MotionWork, Energy and PowerSystem of Particles and Rotational MotionGravitationMechanical Properties of SolidsMechanical Properties of FluidsThermal Properties of MatterThermodynamics (Physics)Kinetic TheoryOscillationsWaves
Class 12Electric Charges and FieldsElectrostatic Potential and CapacitanceCurrent ElectricityMoving Charges and MagnetismMagnetism and MatterElectromagnetic InductionAlternating CurrentElectromagnetic WavesRay Optics and Optical InstrumentsWave OpticsDual Nature of Radiation and MatterAtomsNucleiSemiconductor ElectronicsExperimental Skills (Physics)