NUCLEAR CHEMISTRY MCQs

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1. Which particle has a positive charge and low penetrating power?



2. The time required for half of the radioactive atoms to decay is called:



3. Gamma rays belong to which category?



4. Which unit is used to measure radioactivity?



5. The process in which a heavy nucleus splits into two smaller nuclei is known as:



6. A particle that has no charge and high penetrating ability is:



7. Which law or equation relates mass and energy?



8. The stability of a nucleus primarily depends on the ratio of:



9. The instrument commonly used to detect nuclear radiation is:



10. Alpha decay reduces the mass number of a nucleus by:



11. Beta-minus decay converts a:



12. Which of the following has the highest ionizing power?



13. Carbon-14 is primarily used for:



14. Nuclear fusion occurs naturally in:



15. The particle with the same mass as an electron but opposite charge is:



16. The spontaneous emission of radiation by unstable nuclei is known as:



17. The unit used to measure absorbed dose of radiation is:



18. A radioactive isotope used for cancer treatment is:



19. The strong nuclear force acts between:



20. The particle responsible for carrying energy in gamma radiation is a:



21. Which radiation is used in medical imaging (PET scan)?



22. Nuclear fission is initiated by the absorption of:



23. A nuclide with the same mass number but different atomic number is called:



24. The energy released in a nuclear reaction comes from:



25. Which shielding material is most effective against gamma rays?



26. Tritium is an isotope of:



27. The chain reaction in a nuclear reactor is controlled using:



28. In beta-plus decay, a proton is converted into a:



29. Which radioactive element is widely used in smoke detectors?



30. The decay constant is represented by the symbol:



31. A fission reaction typically releases:



32. Nuclear fusion requires extremely high:



33. A neutron has a charge equal to:



34. The curve representing radioactive decay is:



35. The SI unit of equivalent radiation dose is:



36. A radionuclide that emits only gamma radiation undergoes:



37. A nuclear reactor moderator slows down:



38. The first artificial transmutation was performed by:



39. The product of U-238 decay series is ultimately:



40. X-rays are produced when high-speed electrons strike a:



41. The SI unit of nuclear binding energy is:



42. The process in which two light nuclei combine to form a heavier nucleus is:



43. The daughter nucleus obtained after alpha decay has:



44. The source of energy in stars is mainly:



45. Which isotope is used in PET imaging?



46. The force responsible for binding nucleons is carried by:



47. A radioactive series ends when a ______ nucleus is formed.



48. Which particle has the least penetrating power?



49. The mass defect arises because:



50. The radioisotope iodine-131 is used for diagnosing:



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