{"id":12671,"date":"2025-09-20T07:58:15","date_gmt":"2025-09-20T06:58:15","guid":{"rendered":"https:\/\/mcqsadda.com\/?p=12671"},"modified":"2025-11-10T05:24:12","modified_gmt":"2025-11-10T05:24:12","slug":"radioactivity-top-100-mcqs-with-answer-and-explanation","status":"publish","type":"post","link":"https:\/\/mcqsadda.com\/index.php\/2025\/09\/20\/radioactivity-top-100-mcqs-with-answer-and-explanation\/","title":{"rendered":"Radioactivity Top 100 MCQs With Answer and Explanation"},"content":{"rendered":"\n

1. The spontaneous emission of radiation from unstable nuclei is called<\/mark><\/strong>
A) Radioactivity
B) Fusion
C) Fission
D) Ionization
Answer:<\/strong> A) Radioactivity
Explanation:<\/strong> Radioactivity is the natural process where unstable atomic nuclei emit radiation to attain stability.<\/p>\n\n\n\n

2. Radioactivity is a property of<\/mark><\/strong>
A) Unstable atoms
B) Stable atoms
C) Electrons
D) Molecules
Answer:<\/strong> A) Unstable atoms<\/p>\n\n\n\n

3. The scientist who discovered radioactivity was<\/mark><\/strong>
A) Henri Becquerel
B) Marie Curie
C) Rutherford
D) Bohr
Answer:<\/strong> A) Henri Becquerel
Explanation:<\/strong> Becquerel discovered radioactivity while studying uranium salts in 1896.<\/p>\n\n\n\n

4. The husband and wife team who studied radioactive substances were<\/strong>
<\/mark>A) Pierre and Marie Curie
B) Bohr and Einstein
C) Thomson and Rutherford
D) Newton and Faraday
Answer:<\/strong> A) Pierre and Marie Curie<\/p>\n\n\n\n

5. The element discovered by the Curies is<\/mark><\/strong>
A) Radium
B) Uranium
C) Thorium
D) Plutonium
Answer:<\/strong> A) Radium<\/p>\n\n\n\n

6. The element from which radioactivity was first observed is<\/mark><\/strong>
A) Uranium
B) Radium
C) Polonium
D) Thorium
Answer:<\/strong> A) Uranium<\/p>\n\n\n\n

7. Radioactivity is a<\/mark><\/strong>
A) Nuclear phenomenon
B) Chemical reaction
C) Mechanical process
D) Optical process
Answer:<\/strong> A) Nuclear phenomenon<\/p>\n\n\n\n

8. The particles or rays emitted during radioactivity are called<\/mark><\/strong>
A) Radiations
B) Electrons
C) Photons
D) Protons
Answer:<\/strong> A) Radiations<\/p>\n\n\n\n

9. There are mainly how many types of radioactive emissions?<\/mark><\/strong>
A) Three
B) Two
C) Four
D) Five
Answer:<\/strong> A) Three
Explanation:<\/strong> They are alpha (\u03b1), beta (\u03b2), and gamma (\u03b3) radiations.<\/p>\n\n\n\n

10. Alpha particles are<\/mark><\/strong>
A) Helium nuclei
B) Electrons
C) Protons
D) Neutrons
Answer:<\/strong> A) Helium nuclei<\/p>\n\n\n\n

11. Beta particles are<\/mark><\/strong>
A) Electrons
B) Protons
C) Neutrons
D) Positrons
Answer:<\/strong> A) Electrons<\/p>\n\n\n\n

12. Gamma rays are<\/mark><\/strong>
A) Electromagnetic waves
B) Charged particles
C) Neutrons
D) Protons
Answer:<\/strong> A) Electromagnetic waves<\/p>\n\n\n\n

13. Which of the following is neutral?<\/mark><\/strong>
A) Gamma rays
B) Alpha rays
C) Beta rays
D) Positrons
Answer:<\/strong> A) Gamma rays<\/p>\n\n\n\n

14. Which radiation has the greatest penetrating power?<\/mark><\/strong>
A) Gamma rays
B) Beta rays
C) Alpha rays
D) All equal
Answer:<\/strong> A) Gamma rays<\/p>\n\n\n\n

15. Which radiation is the most ionizing?<\/mark><\/strong>
A) Alpha rays
B) Beta rays
C) Gamma rays
D) X-rays
Answer:<\/strong> A) Alpha rays<\/p>\n\n\n\n

16. Alpha rays can be stopped by<\/mark><\/strong>
A) A sheet of paper
B) A block of lead
C) Thick wall
D) Wood
Answer:<\/strong> A) A sheet of paper<\/p>\n\n\n\n

17. Beta rays can be stopped by<\/mark><\/strong>
A) Thin aluminum sheet
B) Paper
C) Glass sheet
D) Thick wood
Answer:<\/strong> A) Thin aluminum sheet<\/p>\n\n\n\n

18. Gamma rays can be stopped by<\/mark><\/strong>
A) Thick lead sheet
B) Paper
C) Wood
D) Plastic
Answer:<\/strong> A) Thick lead sheet<\/p>\n\n\n\n

19. The radiation that carries positive charge is<\/mark><\/strong>
A) Alpha particle
B) Beta particle
C) Gamma ray
D) Neutron
Answer:<\/strong> A) Alpha particle<\/p>\n\n\n\n

20. The radiation that carries negative charge is<\/mark><\/strong>
A) Beta particle
B) Alpha particle
C) Gamma ray
D) Proton
Answer:<\/strong> A) Beta particle<\/p>\n\n\n\n

21. The emission of gamma rays does not change<\/mark><\/strong>
A) Mass number or atomic number
B) Mass number only
C) Atomic number only
D) Energy of the atom
Answer:<\/strong> A) Mass number or atomic number<\/p>\n\n\n\n

22. The speed of alpha particles is<\/mark><\/strong>
A) Less than that of light
B) Equal to speed of light
C) More than light
D) Same as sound
Answer:<\/strong> A) Less than that of light<\/p>\n\n\n\n

23. The speed of gamma rays is<\/mark><\/strong>
A) Equal to the speed of light
B) Less than sound
C) Variable
D) Zero
Answer:<\/strong> A) Equal to the speed of light<\/p>\n\n\n\n

24. Radioactive decay produces<\/mark><\/strong>
A) Heat and radiation
B) Coldness
C) Sound
D) Electricity
Answer:<\/strong> A) Heat and radiation<\/p>\n\n\n\n

25. Radioactivity was first observed in which compound?<\/mark><\/strong>
A) Uranium salt
B) Lead nitrate
C) Iron oxide
D) Sodium chloride
Answer:<\/strong> A) Uranium salt<\/p>\n\n\n\n

26. The unit of radioactivity is<\/mark><\/strong>
A) Becquerel (Bq)
B) Joule
C) Ohm
D) Ampere
Answer:<\/strong> A) Becquerel
Explanation:<\/strong> 1 Bq = 1 disintegration per second.<\/p>\n\n\n\n

27. The older unit of radioactivity is<\/mark><\/strong>
A) Curie (Ci)
B) Joule
C) Weber
D) Tesla
Answer:<\/strong> A) Curie<\/p>\n\n\n\n

28. The activity of a radioactive substance depends on<\/mark><\/strong>
A) Number of undecayed atoms
B) Temperature
C) Pressure
D) Light
Answer:<\/strong> A) Number of undecayed atoms<\/p>\n\n\n\n

29. The time taken for half of a radioactive material to decay is called<\/strong>
<\/mark>A) Half-life
B) Lifetime
C) Mean life
D) Duration
Answer:<\/strong> A) Half-life<\/p>\n\n\n\n

30. The half-life of Carbon-14 is about<\/mark><\/strong>
A) 5730 years
B) 500 years
C) 100 years
D) 10 years
Answer:<\/strong> A) 5730 years<\/p>\n\n\n\n

31. The half-life of a radioactive substance depends on<\/mark><\/strong>
A) Nature of the isotope
B) Temperature
C) Pressure
D) Amount of sample
Answer:<\/strong> A) Nature of the isotope<\/p>\n\n\n\n

32. The half-life of a substance is independent of<\/strong>
<\/mark>A) Physical and chemical conditions
B) Mass
C) Volume
D) Temperature
Answer:<\/strong> A) Physical and chemical conditions<\/p>\n\n\n\n

33. The disintegration of a radioactive atom is<\/mark><\/strong>
A) Spontaneous and random
B) Regular
C) Predictable
D) Controlled
Answer:<\/strong> A) Spontaneous and random<\/p>\n\n\n\n

34. Radioactive decay continues until<\/mark><\/strong>
A) A stable nucleus is formed
B) The atom explodes
C) Energy is zero
D) Heat is lost
Answer:<\/strong> A) A stable nucleus is formed<\/p>\n\n\n\n

35. The first artificial radioactive element was<\/mark><\/strong>
A) Phosphorus-30
B) Uranium-235
C) Carbon-14
D) Radium-226
Answer:<\/strong> A) Phosphorus-30<\/p>\n\n\n\n

36. Artificial radioactivity was discovered by<\/mark><\/strong>
A) Irene Curie and Joliot Curie
B) Henri Becquerel
C) Rutherford
D) Bohr
Answer:<\/strong> A) Irene Curie and Joliot Curie<\/p>\n\n\n\n

37. A device used to detect and measure radiation is<\/mark><\/strong>
A) Geiger-M\u00fcller counter
B) Photometer
C) Microscope
D) Barometer
Answer:<\/strong> A) Geiger-M\u00fcller counter<\/p>\n\n\n\n

38. The radioactive isotope used in cancer treatment is<\/mark><\/strong>
A) Cobalt-60
B) Carbon-14
C) Sodium-24
D) Uranium-235
Answer:<\/strong> A) Cobalt-60<\/p>\n\n\n\n

39. The radioactive isotope used in carbon dating is<\/mark><\/strong>
A) Carbon-14
B) Uranium-238
C) Thorium-232
D) Iodine-131
Answer:<\/strong> A) Carbon-14<\/p>\n\n\n\n

40. The isotope used in thyroid treatment is<\/mark><\/strong>
A) Iodine-131
B) Cobalt-60
C) Phosphorus-32
D) Sodium-24
Answer:<\/strong> A) Iodine-131<\/p>\n\n\n\n

41. The isotope used to study blood circulation in the body is<\/mark><\/strong>
A) Sodium-24
B) Carbon-14
C) Cobalt-60
D) Iodine-131
Answer:<\/strong> A) Sodium-24
Explanation:<\/strong> Sodium-24 emits gamma radiation and is used as a tracer to observe blood flow and circulation.<\/p>\n\n\n\n

42. The radioactive isotope used to study plant metabolism is<\/mark><\/strong>
A) Phosphorus-32
B) Iodine-131
C) Carbon-14
D) Uranium-235
Answer:<\/strong> A) Phosphorus-32
Explanation:<\/strong> Phosphorus-32 helps trace phosphorus movement in plants for agricultural studies.<\/p>\n\n\n\n

43. The isotope used to detect leaks in gas pipelines is<\/mark><\/strong>
A) Argon-41
B) Carbon-14
C) Iodine-131
D) Sodium-24
Answer:<\/strong> A) Argon-41
Explanation:<\/strong> Argon-41 is a radioactive tracer gas used to detect leaks in closed systems.<\/p>\n\n\n\n

44. The radiation used for sterilizing medical instruments is<\/mark><\/strong>
A) Gamma rays
B) Alpha rays
C) Beta rays
D) Ultraviolet rays
Answer:<\/strong> A) Gamma rays
Explanation:<\/strong> Gamma rays kill bacteria and viruses and are used for sterilization in hospitals.<\/p>\n\n\n\n

45. The radiation used to preserve food for long durations is<\/mark><\/strong>
A) Gamma rays
B) X-rays
C) Beta rays
D) Ultraviolet rays
Answer:<\/strong> A) Gamma rays
Explanation:<\/strong> Gamma irradiation destroys microorganisms, keeping food fresh for longer periods.<\/p>\n\n\n\n

46. The radioactive element found in luminous watch dials is<\/mark><\/strong>
A) Radium
B) Uranium
C) Thorium
D) Cobalt
Answer:<\/strong> A) Radium
Explanation:<\/strong> Radium glows in the dark due to its continuous radiation.<\/p>\n\n\n\n

47. Radioactive decay produces<\/mark><\/strong>
A) Energy in the form of heat and radiation
B) Sound energy
C) Electric energy only
D) Light only
Answer:<\/strong> A) Energy in the form of heat and radiation<\/p>\n\n\n\n

48. The energy released in radioactive decay comes from<\/mark><\/strong>
A) The nucleus
B) The electrons
C) The atom as a whole
D) Chemical bonds
Answer:<\/strong> A) The nucleus
Explanation:<\/strong> Nuclear energy is released when the nucleus changes into a more stable form.<\/p>\n\n\n\n

49. Radioactivity is independent of<\/mark><\/strong>
A) Temperature, pressure, and chemical state
B) Number of atoms
C) Mass of sample
D) Energy absorbed
Answer:<\/strong> A) Temperature, pressure, and chemical state<\/p>\n\n\n\n

50. The instrument used to detect radiation is<\/mark><\/strong>
A) Geiger-M\u00fcller counter
B) Microscope
C) Barometer
D) Photometer
Answer:<\/strong> A) Geiger-M\u00fcller counter<\/p>\n\n\n\n

51. The process by which one element changes into another due to radioactivity is called<\/mark><\/strong>
A) Transmutation
B) Transformation
C) Translocation
D) Translation
Answer:<\/strong> A) Transmutation
Explanation:<\/strong> During radioactive decay, a nucleus changes to another element through emission of particles.<\/p>\n\n\n\n

52. Artificial radioactivity was discovered by<\/mark><\/strong>
A) Irene Curie and Frederic Joliot-Curie
B) Rutherford
C) Bohr
D) Einstein
Answer:<\/strong> A) Irene Curie and Frederic Joliot-Curie<\/p>\n\n\n\n

53. The first artificially radioactive element produced was<\/mark><\/strong>
A) Phosphorus-30
B) Uranium-235
C) Radium-226
D) Thorium-232
Answer:<\/strong> A) Phosphorus-30<\/p>\n\n\n\n

54. Artificial radioactivity is caused by<\/mark><\/strong>
A) Bombarding stable nuclei with particles
B) Heating the atom
C) Chemical reactions
D) Magnetic field
Answer:<\/strong> A) Bombarding stable nuclei with particles<\/p>\n\n\n\n

55. Radioactive isotopes are used in medicine for<\/mark><\/strong>
A) Diagnosis and treatment
B) Food preservation only
C) Decoration
D) Light production
Answer:<\/strong> A) Diagnosis and treatment<\/p>\n\n\n\n

56. The isotope used to detect cancer is<\/mark><\/strong>
A) Cobalt-60
B) Carbon-14
C) Sodium-24
D) Argon-41
Answer:<\/strong> A) Cobalt-60
Explanation:<\/strong> Cobalt-60 emits gamma rays used to destroy cancerous cells.<\/p>\n\n\n\n

57. The device used to monitor radiation exposure in workers is<\/mark><\/strong>
A) Dosimeter
B) Voltmeter
C) Barometer
D) Galvanometer
Answer:<\/strong> A) Dosimeter<\/p>\n\n\n\n

58. The radioactive isotope used in smoke detectors is<\/mark><\/strong>
A) Americium-241
B) Uranium-235
C) Radium-226
D) Carbon-14
Answer:<\/strong> A) Americium-241
Explanation:<\/strong> It emits alpha particles that help detect smoke in the air.<\/p>\n\n\n\n

59. The isotope used in radiocarbon dating is<\/mark><\/strong>
A) Carbon-14
B) Cobalt-60
C) Uranium-238
D) Sodium-24
Answer:<\/strong> A) Carbon-14<\/p>\n\n\n\n

60. The process of determining the age of fossils using radioactivity is called<\/mark><\/strong>
A) Radiocarbon dating
B) Radiotherapy
C) Radio tracing
D) Photometry
Answer:<\/strong> A) Radiocarbon dating<\/p>\n\n\n\n

61. The isotope used in nuclear power generation is<\/mark><\/strong>
A) Uranium-235
B) Carbon-12
C) Oxygen-16
D) Sodium-24
Answer:<\/strong> A) Uranium-235<\/p>\n\n\n\n

62. Radioactive elements emit<\/mark><\/strong>
A) Alpha, beta, and gamma rays
B) Light rays only
C) X-rays only
D) Sound waves
Answer:<\/strong> A) Alpha, beta, and gamma rays<\/p>\n\n\n\n

63. The radioactive element used in luminous paints is<\/mark><\/strong>
A) Radium
B) Iron
C) Sodium
D) Phosphorus
Answer:<\/strong> A) Radium<\/p>\n\n\n\n

64. A half-life of a substance means<\/mark><\/strong>
A) Time taken for half atoms to decay
B) Half energy released
C) Time for complete decay
D) None
Answer:<\/strong> A) Time taken for half atoms to decay<\/p>\n\n\n\n

65. The decay rate of a radioactive substance decreases<\/mark><\/strong>
A) Exponentially with time
B) Linearly
C) Constantly
D) Irregularly
Answer:<\/strong> A) Exponentially with time<\/p>\n\n\n\n

66. The process of radioactive decay continues<\/mark><\/strong>
A) Until a stable nucleus is formed
B) Indefinitely
C) Only at low temperature
D) Only at high pressure
Answer:<\/strong> A) Until a stable nucleus is formed<\/p>\n\n\n\n

67. The radiation most dangerous to human tissue is<\/mark><\/strong>
A) Gamma rays
B) Beta rays
C) Alpha rays
D) Infrared rays
Answer:<\/strong> A) Gamma rays<\/p>\n\n\n\n

68. The unit of radiation dose absorbed by the body is<\/mark><\/strong>
A) Gray (Gy)
B) Joule
C) Volt
D) Watt
Answer:<\/strong> A) Gray (Gy)<\/p>\n\n\n\n

69. The unit that measures biological damage from radiation is<\/strong>
<\/mark>A) Sievert (Sv)
B) Curie
C) Joule
D) Ohm
Answer:<\/strong> A) Sievert (Sv)<\/p>\n\n\n\n

70. Excessive exposure to radiation causes<\/mark><\/strong>
A) Cancer and genetic defects
B) Increase in body strength
C) Muscle growth
D) Faster aging only
Answer:<\/strong> A) Cancer and genetic defects<\/p>\n\n\n\n

71. The process of radioactive decay produces<\/mark><\/strong>
A) New elements
B) Same element
C) Light only
D) Electric charge only
Answer:<\/strong> A) New elements<\/p>\n\n\n\n

72. Nuclear reactors produce energy mainly by<\/mark><\/strong>
A) Controlled fission
B) Fusion
C) Combustion
D) Ionization
Answer:<\/strong> A) Controlled fission<\/p>\n\n\n\n

73. The process of converting a stable nucleus into a radioactive one is called<\/mark><\/strong>
A) Artificial transmutation
B) Radioactive decay
C) Fusion
D) Ionization
Answer:<\/strong> A) Artificial transmutation<\/p>\n\n\n\n

74. The particles emitted in radioactivity affect<\/mark><\/strong>
A) Photographic plates
B) Magnetic field
C) Chemical reaction
D) Light color
Answer:<\/strong> A) Photographic plates<\/p>\n\n\n\n

75. The radioactivity of an element is measured by<\/strong>
<\/mark>A) Geiger counter
B) Barometer
C) Thermometer
D) Electroscope
Answer:<\/strong> A) Geiger counter<\/p>\n\n\n\n

76. The rate of radioactive decay depends on<\/strong>
<\/mark>A) Number of undecayed nuclei
B) Temperature
C) Light intensity
D) Pressure
Answer:<\/strong> A) Number of undecayed nuclei<\/p>\n\n\n\n

77. The number of disintegrations per second of a sample is called<\/strong>
<\/mark>A) Activity
B) Half-life
C) Mass
D) Density
Answer:<\/strong> A) Activity<\/p>\n\n\n\n

78. Radioactive decay series ends when<\/mark><\/strong>
A) Stable lead isotope is formed
B) All atoms vanish
C) Energy stops
D) Uranium forms
Answer:<\/strong> A) Stable lead isotope is formed<\/p>\n\n\n\n

79. The element used as fuel in nuclear reactors is<\/mark><\/strong>
A) Uranium or Plutonium
B) Iron
C) Copper
D) Sodium
Answer:<\/strong> A) Uranium or Plutonium<\/p>\n\n\n\n

80. The radiation used in medical imaging is<\/mark><\/strong>
A) Gamma rays
B) Ultraviolet rays
C) Infrared rays
D) Microwaves
Answer:<\/strong> A) Gamma rays<\/p>\n\n\n\n

81. The radiation that causes maximum ionization in air is<\/mark><\/strong>
A) Alpha radiation
B) Beta radiation
C) Gamma radiation
D) X-rays
Answer:<\/strong> A) Alpha radiation<\/p>\n\n\n\n

82. The isotope used in checking pipeline corrosion is<\/mark><\/strong>
A) Sodium-24
B) Carbon-14
C) Uranium-235
D) Iodine-131
Answer:<\/strong> A) Sodium-24<\/p>\n\n\n\n

83. The radiation most penetrating through human skin is<\/mark><\/strong>
A) Gamma rays
B) Alpha rays
C) Beta rays
D) Visible light
Answer:<\/strong> A) Gamma rays<\/p>\n\n\n\n

84. The process by which the nucleus loses energy without changing its structure is<\/mark><\/strong>
A) Gamma emission
B) Alpha decay
C) Beta decay
D) Fission
Answer:<\/strong> A) Gamma emission<\/p>\n\n\n\n

85. The scientist who explained nuclear structure was<\/mark><\/strong>
A) Rutherford
B) Bohr
C) Curie
D) Becquerel
Answer:<\/strong> A) Rutherford<\/p>\n\n\n\n

86. The isotope used for detecting water pollution is<\/mark><\/strong>
A) Tritium
B) Iodine-131
C) Sodium-24
D) Phosphorus-32
Answer:<\/strong> A) Tritium<\/p>\n\n\n\n

87. The radioactive element naturally found in soil is<\/mark><\/strong>
A) Uranium
B) Iron
C) Silver
D) Copper
Answer:<\/strong> A) Uranium<\/p>\n\n\n\n

88. Radioactive elements occur naturally in<\/strong>
<\/mark>A) Earth\u2019s crust
B) Oceans
C) Atmosphere only
D) Plants
Answer:<\/strong> A) Earth\u2019s crust<\/p>\n\n\n\n

89. The instrument used to monitor radiation level in nuclear plants is<\/strong>
<\/mark>A) Geiger counter
B) Thermometer
C) Barometer
D) Manometer
Answer:<\/strong> A) Geiger counter<\/p>\n\n\n\n

90. The isotope used in detecting tumors is<\/mark><\/strong>
A) Cobalt-60
B) Sodium-24
C) Uranium-235
D) Iodine-131
Answer:<\/strong> A) Cobalt-60<\/p>\n\n\n\n

91. The radioactive waste is disposed of by<\/mark><\/strong>
A) Deep underground storage
B) Throwing in rivers
C) Burning in air
D) Sunlight exposure
Answer:<\/strong> A) Deep underground storage<\/p>\n\n\n\n

92. The radiation that can cause genetic mutations is<\/mark><\/strong>
A) Gamma rays
B) Alpha rays
C) Infrared rays
D) Microwaves
Answer:<\/strong> A) Gamma rays<\/p>\n\n\n\n

93. The radiation used for industrial thickness testing is<\/mark><\/strong>
A) Beta rays
B) Gamma rays
C) Alpha rays
D) Infrared rays
Answer:<\/strong> A) Beta rays<\/p>\n\n\n\n

94. The radioactive element used in nuclear submarines is<\/mark><\/strong>
A) Uranium
B) Sodium
C) Iron
D) Carbon
Answer:<\/strong> A) Uranium<\/p>\n\n\n\n

95. The first person to coin the term \u201cradioactivity\u201d was<\/mark><\/strong>
A) Marie Curie
B) Becquerel
C) Rutherford
D) Bohr
Answer:<\/strong> A) Marie Curie<\/p>\n\n\n\n

96. The radiation that can be deflected by electric and magnetic fields is<\/strong>
<\/mark>A) Alpha and Beta rays
B) Gamma rays only
C) Neutrons only
D) None
Answer:<\/strong> A) Alpha and Beta rays<\/p>\n\n\n\n

97. The isotope used in determining groundwater age is<\/mark><\/strong>
A) Tritium
B) Sodium-24
C) Carbon-14
D) Cobalt-60
Answer:<\/strong> A) Tritium<\/p>\n\n\n\n

98. Radioactivity is commonly measured by<\/mark><\/strong>
A) Geiger counter and Scintillation counter
B) Voltmeter
C) Hydrometer
D) Spectrometer
Answer:<\/strong> A) Geiger counter and Scintillation counter<\/p>\n\n\n\n

99. The energy released in radioactivity is called<\/mark><\/strong>
A) Nuclear energy
B) Chemical energy
C) Thermal energy
D) Mechanical energy
Answer:<\/strong> A) Nuclear energy<\/p>\n\n\n\n

100. The ultimate goal of radioactive decay is to form<\/mark><\/strong>
A) A stable nucleus
B) A charged atom
C) A heavier nucleus
D) A moving atom
Answer:<\/strong> A) A stable nucleus<\/p>\n","protected":false},"excerpt":{"rendered":"

1. The spontaneous emission of radiation from unstable nuclei is calledA) RadioactivityB) FusionC) FissionD) IonizationAnswer: A) RadioactivityExplanation: Radioactivity is the natural process where unstable atomic nuclei emit radiation to attain stability. 2. Radioactivity is a property ofA) Unstable atomsB) Stable atomsC) ElectronsD) MoleculesAnswer: A) Unstable atoms 3. The scientist who discovered radioactivity wasA) Henri BecquerelB)<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,19],"tags":[15794,15798,15797,15481,15759,15753,15757,4029,5649,5652,15465,5623,15800,15743,15803,15749,15536,15479,15474,15467,15483,15472,15592,15456,15478,15805,15801,15796,15804,15795,15799,15802,10959,15469,15480],"class_list":{"0":"post-12671","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-physics","7":"category-science","8":"tag-alpha-decay","9":"tag-atomic-nucleus","10":"tag-beta-decay","11":"tag-competitive-exam-physics","12":"tag-decay-constant","13":"tag-gamma-radiation","14":"tag-half-life","15":"tag-mcqs-adda","16":"tag-mcqs-for-pc-psi-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-exams","17":"tag-mcqs-for-pc-psi-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-examsin-kannada","18":"tag-mcqs-for-physics-exam","19":"tag-mcqs-for-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-exams","20":"tag-nuclear-energy","21":"tag-nuclear-physics","22":"tag-nuclear-radiation","23":"tag-nuclear-reactions","24":"tag-physics-formulas","25":"tag-physics-learning","26":"tag-physics-mcqs","27":"tag-physics-preparation-material","28":"tag-physics-questions-and-answers","29":"tag-physics-quiz","30":"tag-physics-revision","31":"tag-physics-study-material","32":"tag-psc-physics-mcqs","33":"tag-radiation-measurement","34":"tag-radiation-safety","35":"tag-radioactive-applications","36":"tag-radioactive-decay-law","37":"tag-radioactive-elements","38":"tag-radioactivity-in-physics","39":"tag-radioactivity-problems","40":"tag-radioactivity-top-100-mcqs-with-answer-and-explanation","41":"tag-ssc-physics-mcqs","42":"tag-upsc-physics-mcqs"},"_links":{"self":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12671","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/comments?post=12671"}],"version-history":[{"count":5,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12671\/revisions"}],"predecessor-version":[{"id":17702,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12671\/revisions\/17702"}],"wp:attachment":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/media?parent=12671"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/categories?post=12671"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/tags?post=12671"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}