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Nuclei

JEE Main 2024 (Online) 1st February Evening ShiftMCQMedium📈 Topic in 2% papers+4−1
Ques. 1JEE 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

Answer

(3) (A), (B), (C), (E) only

Solution

(A): Bohr's postulate L=mvr=n ⇒ (A) is correct

(B): nuclear force is short-ranged (about 2–3 fm) and falls much faster than 1r2 ⇒ (B) is correct

(C): force between two nucleons depends on their relative spin orientation ⇒ (C) is correct

(D): it is charge independent, but NOT purely central (it has a non-central, tensor part) ⇒ (D) is incorrect

(E): smaller packing fraction → larger binding energy per nucleon → more stable nucleus ⇒ (E) is correct

(A), (B), (C), (E) only

Answer: (3)

Keep practising — Nuclei

Ques. 2JEE 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. 3JEE 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. 4JEE 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. 5JEE 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
Ques. 6JEE Main 2024, 29 January (Morning Shift)

The explosive in a Hydrogen bomb is a mixture of 1H2, 1H3 and 3Li6 in some condensed form. The chain reaction is given by 3Li6+0n1 2He4+1H3 1H2+1H3 2He4+0n1 During the explosion the energy released is approximately [Given ; M(Li)=6.01690 amu, M (1H2 )=2.01471 amu, M (2He4 )=4.00388 amu, and 1 amu=931.5 MeV]

  1. 22.22 MeV
  2. 28.12 MeV
  3. 16.48 MeV
  4. 12.64 MeV
Ques. 7JEE Main 2024, 27 January (Morning Shift)

In a nuclear fission process, a high mass nuclide (A 236) with binding energy 7.6 MeV/Nucleon dissociated into middle mass nuclides (A 118), having binding energy of 8.6 MeV/Nucleon. The energy released in the process would be MeV.

Ques. 8JEE Main 2024, 27 January (Evening Shift)

The atomic mass of 6C12 is 12.000000 u and that of 6C13 is 13.003354 u. The required energy to remove a neutron from 6C13, if mass of neutron is 1.008665 u, will be :

  1. 62.5 MeV
  2. 6.25 MeV
  3. 4.95 MeV
  4. 49.5 MeV

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