MCQ on Class 12 Physics Chapter 13 Nuclei with Answers

We have compiled the MCQ Questions for Class 12 Chemistry Chapter 13 Nuclei with Answers Pdf free download covering the entire syllabus for JEE/NEET and Boards. Practice MCQ Questions for Class 12 Physics with Answers on a daily basis and score well in exams. Refer to the Nuclei Class 12 MCQs Quiz Questions with Answers here along with a detailed explanation

Nuclei Class 12 MCQs Questions with Answers

MCQ Questions for Class 12 Physics Chapter 13 Nuclei with Answers

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1. Three specimens A, B, C of same radioactive element has activities 1 microcurie, 1 rutherford and 1 becquerel respectively. Which specimen has maximum mass?

 
 
 
 

2. Fusion reactions take place at high temperature because

 
 
 
 

3. Boron rods in a nuclear reactor are used to

 
 
 
 

4. Which of the following are not emitted by radioactive substances?

 
 
 
 

5. Control rods used in nuclear reactors are made of

 
 
 
 

6. The half-life period and the mean life period of a radioactive
element are denoted respectively by Th and Tm. Then

 
 
 
 

7. The process of radioactive radiations remains unaffected due to

 
 
 
 

8. An electron emitted in beta radiation originates from

 
 
 
 

9. For a nuclear fusion process, suitable nuclei are

 
 
 
 

10. Nuclear forces exists between

 
 
 
 

11. The electrons cannot exist inside the nucleus because

 
 
 
 

12. The half life of a radioactive susbtance is 30 days. What is the time taken to disintegrate to 3/4th of its original mass?

 
 
 
 

13. A radioactive nucleus emits a beta particle. The parent and daughter nuclei are

 
 
 
 

14. When a radioactive nucleus emits a (β-particle, the mass number of the atom

 
 
 
 

15. The quantity which is not conserved in a nuclear reaction is

 
 
 
 

16.  Tritium is an isotope of hydrogen whose nucleus Triton contains 2 neutrons and 1 proton. Free neutrons decay into p + e¯+v¯. If one of the neutrons in Triton decays, it would transform into He3 nucleus. This does not happen. This is becauseTriton energy is less than that of a He3\ nucleus.

 
 
 
 

17.  γ-rays are originated from

 
 
 
 

18. When a nucleus in an atom undergoes a radioactive decay, the electronic energy levels of the atom

 
 
 
 

19. Radioactive substance emits

 
 
 
 

20. Samples of two radioactive nuclides A and B are taken λA and λB are the disintegration constants of A and B respectively. In which of the following cases, the two samples can simultaneously have the same decay rate at any time?

 
 
 
 

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