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.

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.
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   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
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   Answer: D. All of the above

   These are all common forms of radioactive decay.

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