Nuclear Reactions Quiz - CBSE Class 12 Physics

Free practice quiz: Nuclear Reactions (CBSE Class 12 Physics). 16 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 12 Physics practice quiz has 16 multiple-choice questions on Nuclear Reactions, and 16 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which of the following is NOT a type of nuclear reaction?

   1. Nuclear fission
   2. Nuclear fusion
   3. Radioactive decay
   4. Chemical reaction
   Show answer

   Answer: D. Chemical reaction

   Chemical reactions involve the rearrangement of electrons, while nuclear reactions involve changes in the nucleus.

2. Explain the difference between nuclear fission and nuclear fusion.

   1. Fission splits a nucleus; fusion combines nuclei.
   2. Fission releases less energy than fusion.
   3. Fission uses heavy nuclei; fusion uses light nuclei.
   4. All of the above.
   Show answer

   Answer: D. All of the above.

   All the given options correctly describe the differences between nuclear fission and fusion.

3. A certain radioactive isotope has a half-life of 10 years. If you start with 100g, how much will remain after 30 years?

   1. 25g
   2. 50g
   3. 12.5g
   4. 75g
   Show answer

   Answer: C. 12.5g

   After 30 years (3 half-lives), 100g * (1/2)^3 = 12.5g remains.

4. Explain the concept of nuclear transmutation and give an example.

   1. Conversion of one element into another through nuclear reactions.
   2. Conversion of one isotope into another through nuclear reactions.
   3. Both of the above.
   4. None of the above.
   Show answer

   Answer: C. Both of the above.

   Nuclear transmutation is the conversion of one element or isotope into another.

5. What are some common radioactive decay processes?

   1. Alpha decay, beta decay, gamma decay
   2. Proton decay, neutron decay
   3. Electron capture
   4. All of the above
   Show answer

   Answer: D. All of the above

   These are all common forms of radioactive decay.

More questions in this quiz

Answers and explanations are in the full quiz.

1. In a nuclear fission reaction, a heavy nucleus splits into two lighter nuclei. What is the primary energy source released during this process?
2. What is the process called where two light nuclei combine to form a heavier nucleus, releasing a tremendous amount of energy?
3. What is the significance of the binding energy per nucleon in understanding nuclear stability and reactions?
4. What particle is primarily responsible for mediating the strong nuclear force that holds the nucleus together?
5. Describe the concept of a chain reaction in the context of nuclear fission.
6. What are some of the challenges associated with achieving controlled nuclear fusion for energy production?
7. Derive the Q-value of a nuclear reaction using the concept of mass defect and Einstein's mass-energy equivalence. Discuss the significance of a positive versus negative Q-value.
8. Explain the role of moderators and control rods in a nuclear reactor.
9. What is the difference between spontaneous and induced nuclear fission?
10. How is nuclear energy used in medicine?
11. What are some environmental concerns related to nuclear energy?

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