Nuclear Science Quiz 5 (25 MCQs)

Quiz Instructions:

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1. The function of moderators in nuclear reactor is to

2. What is the Half-Life of Carbon 14

3. Atoms of U-238 and U-235 differ in structure by three

4. Unit of radioactivity is

5. The time required for half of the _____ of a radioactive isotope to decay is called its half life.

6. What type of radiation has a negligible mass and consists of high energy radiation?

7. Pick out the wrong statement.

8. Protons and Neutrons are called _____

9. _____ nuclear reactor does not require a heat exchanger to supply steam to power turbine.

10. Which is the most commonly used molten metal for cooling of nuclear reactors?

11. Emission of $\beta$-particles during radioactive decay of a substance is from

12. Which of the following may not need a moderator?

13. The second underground nuclear test was conducted by India at

14. Geiger's law can be expressed in the form

15. An electron has a mass that is approximately _____ that of the proton.

16. Finish the equation22688Ra $\rightarrow$ _____ + 22688Ra

17. Which Uranium isotope is used in nuclear power plants to produce electricity?

18. The half life period of a radioactive element is 100 days. After 400 days, one gm of the element will be reduced to _____ gm.

19. If nucleus is formed from separate nucleons, then energy is

20. What happens to the isotope astatine-210 when it interacts with a beta particle (you have 3 minutes use periodic table)

21. The function of heavy water in a nuclear reactor is to

22. In a nuclear reactor, which part converts nuclear energy to heat energy?

23. What does it mean when an element is radioactive?

24. A radioactive isotope undergoes decay with respect to time following _____ law.

25. Energy given to nucleus to dismantle it increases the