Physics Class 12 MCQ Nuclei – Chapter 13

Check below all the important NCERT class 12 MCQs with answers on Nuclei Chapter 13 Physics. These questions have been prepared while keeping in mind the latest pattern of the board, and these will help you a lot in scoring good marks.Practice these latest MCQs of Nuclei Chapter 13 Physics Class 12.

These questions of nuclei chapter 13 physics class 12 will help you a lot in understanding the basic concept of the chapter and this will be beneficial for you all in your board exam. So, practice as many times as you want to practice these mcqs of nuclei chapter 13 physics class 12, and score good marks in your boards.

Physics Class 12 MCQ Dual Nature of Radiation And Matter – Chapter 11

Physics Class 12 MCQ Nuclei – Chapter 13

Ques 1: The ratio of size of a hydrogen atom to the size of its nucleus is

  • 105
  • 105
  • 104
  • 10-4

105

Ques 2: Two elementary particles which have almost infinite life are

  • electron and neutron
  • neutron and proton
  • electron and proton
  • none of the above

electron and proton

Ques 3: Radioactive radiations in order of increasing penetrating power are:

  • γ,β,α
  • γ,α,β
  • α,β,γ
  • α,γ,β

α,β,γ

Ques 4: A radioactive element has half life of 30 seconds. If one of the nuclei decays now, the next one will decay

  • any time
  • after 30s
  • after 60 s
  • after 30 h

any time

Ques 5: A nucleus nXm emits one α particle and one β particle. The mass number and atomic number of product nucleus, are

  • (m-4),n
  • (m-4),(n-1)
  • (m-3), n+1
  • (m-3), (n-1)

(m-4),(n-1)

Nuclei Class 12 Physics MCQs

Ques 6: Out of 6C14, 7N13, 7N14 and 8O16, the pair of isotones is

  • 6C14, 8O16
  • 7N14, 7N13
  • 7N14, 6C14
  • 7N14, 8O16

6C14, 8O16

Ques 7: The average binding energy per nucleon is maximum for the nucleus.

  • 24He
  • sub>216O
  • 26>56Fe
  • 92238U

26>56Fe

Ques 8: In the Uranium radioactive series, the initial nucleus is 92238U and the final nucleus is 82266Pb. of α-particle and β-particle emitted are

  • 8 α, 6β
  • 6α, 7β
  • 6α, 8β
  • 4α, 3β

8 α, 6β

Ques 9: In gamma rays emission from a nucleus,

  • only the proton number changes
  • both the proton number and neutron number change
  • there is no change in the proton number and neutron number
  • only the neutron number changes

there is no change in the proton number and neutron number

Ques 10: Starting with a sample of pure Cu66, 7/6 of it decays into Zn in 15 minutes. The corresponding half life is

  • 10 minutes
  • 15 minutes
  • 5 minutes
  • 7.5 minutes

5 minutes

Physics MCQs for Class 12 With Solutions Chapter 13 Nuclei

Ques 11: Activity of a radioactive sample decreases to (1/3) of its original value in 3 days. Then in 9 days its activity will become

  • 1/27 of the original value
  • 1/9 of the original value
  • 1/18 of the original value
  • 1/3 of the original value

1/27 of the original value

Ques 12: Which word equation represents β+ decay?

  • proton → neutron + electron + electron antineutrino
  • proton → neutron + positron + electron antineutrino
  • proton → neutron + positron + electron antineutrino
  • proton → neutron + positron + electron neutrino

proton → neutron + positron + electron neutrino

Ques 13: In a radioactive decay series, three successive decays each result in a particle being emitted. The first decay results in the emission of a β-particle. The second decay results in the emission of an α-particle. The third decay results in the emission of another β+-particle.

Nuclides P and S are compared.
Which statement is correct ?

  • P and S are identical in all respects.
  • P and S are isotopes of the same element.
  • S is a different element of lower atomic number.
  • S is a different element of reduced mass.

P and S are isotopes of the same element.

Ques 14: What is the ratio of nuclear radii if the mass numbers of two nuclei are 4 and 32

  • 1 : 2
  • 1 : 3
  • 1 : 4
  • 1 : 5

1 : 2

Important Questions On Nuclei Chapter 13

Ques 15: Which statement about alpha, beta and gamma radiation is correct ?

    • Alpha radiation has the greatest ionizing power.
    • Beta radiation has the greatest ionizing power.
    • Gamma radiation has the greatest ionizing power.
    • Alpha, beta and gamma radiation have nearly equal ionizing powers.

    Alpha radiation has the greatest ionizing power.

Ques 16: The nuclei of the isotopes of an element all contain the same number of a certain particle. What is this particle ?

  • electron
  • neutron
  • nucleon
  • proton

proton

Physics Chapter Wise MCQ Questions and Answers

  1. Electrostatic Charges and Fields MCQ – Chapter 1
  2. Electrostatic Potential and Capacitance MCQ – Chapter 2
  3. Current Electricity MCQ Question Answer – Chapter 3
  4. Moving Charges and Magnetism MCQ – Chapter 4
  5. Magnetism And Matter MCQ – Chapter 5
  6. Electromagnetic Induction MCQ – Chapter 6
  7. MCQ Alternating Current MCQ – Chapter 7
  8. Electromagnetic Waves MCQ – Chapter 8
  9. Ray Optics And Optical Instruments MCQ – Chapter 9
  10. MCQ Wave Optics MCQ – Chapter 10
  11. Dual Nature of Radiation and Matter MCQ – Chapter 11
  12. Atoms MCQ – Chapter 12
  13. Nuclei MCQ – Chapter 13
  14. Semiconductor Electronics : Materials, Devices And Simple Circuits MCQ – Chapter 14

physics 12 mcq

We hope that this collection of question will help you a lot in understanding this chapter and you will score really good marks from this chapter nuclei physics class 12. In case you have any doubts in understanding anything, you may notify us via comment box provided below.

Updated: October 17, 2021 — 11:56 am

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