Practice test

Radioactivity and nuclear energy - Test Set 1

Review 20 exam-focused questions with detailed explanations, then start the interactive test when you are ready.

20 questions

Questions and explanations

  1. Question 1

    Which of the following isotopes is used for carbon dating?
    1. C-12
    2. C-13
    3. C-14
    4. C-11
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  2. Question 2

    Neutron was discovered by:
    1. Bohr
    2. Chadwick
    3. Rutherford
    4. Thomson
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  3. Question 3

    Nuclear power plants in India are regulated by:
    1. DRDO
    2. DAE
    3. AERB
    4. ISRO
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  4. Question 4

    Which radioactive element is used in smoke detectors?
    1. Thorium
    2. Radon
    3. Americium-241
    4. Carbon-14
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  5. Question 5

    Fission of Uranium-235 releases how much energy approximately?
    1. 200 MeV
    2. 20 MeV
    3. 100 MeV
    4. 500 MeV
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  6. Question 6

    The nuclear fusion reaction in stars is mainly a conversion of:
    1. Helium to Hydrogen
    2. Hydrogen to Helium
    3. Hydrogen to Helium
    4. Carbon to Oxygen
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  7. Question 7

    Which radiation has the highest penetrating power?
    1. Alpha
    2. Beta
    3. Gamma
    4. Proton
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  8. Question 8

    Who discovered natural radioactivity?
    1. J.J. Thomson
    2. Henri Becquerel
    3. Marie Curie
    4. Enrico Fermi
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  9. Question 9

    Who discovered radioactivity, leading to a Nobel Prize in Physics in 1903?
    1. Marie Curie
    2. Henri Becquerel
    3. Ernest Rutherford
    4. Wilhelm Rontgen
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  10. Question 10

    Which unit is used to measure the activity of a radioactive source in the SI system?
    1. Curie
    2. Rad
    3. Roentgen
    4. Becquerel
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  11. Question 11

    Which type of radiation has the highest ionizing power?
    1. Alpha
    2. Beta
    3. Gamma
    4. Neutron
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  12. Question 12

    Which radioactive series ends with the stable isotope Lead-206?
    1. Uranium Series
    2. Thorium Series
    3. Actinium Series
    4. Neptunium Series
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  13. Question 13

    What is the primary use of Cobalt-60 in medical applications?
    1. Diagnostic imaging
    2. Radiation therapy
    3. Carbon dating
    4. Nuclear power generation
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  14. Question 14

    What is the half-life of Carbon-14, used in carbon dating?
    1. 5,730 years
    2. 12 years
    3. 1,600 years
    4. 1,600 years
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  15. Question 15

    Which isotope is used in the uranium dating method for geological samples?
    1. Uranium-235
    2. Uranium-238
    3. Thorium-232
    4. Potassium-40
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  16. Question 16

    What is the primary source of energy in a nuclear fission reaction?
    1. Mass defect
    2. Kinetic energy of neutrons
    3. Electromagnetic radiation
    4. Chemical bonding
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  17. Question 17

    Which particle is emitted during beta-minus decay?
    1. Electron
    2. Positron
    3. Neutron
    4. Proton
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  18. Question 18

    Which material is used as a moderator in nuclear reactors to slow down neutrons?
    1. Cadmium
    2. Graphite
    3. Boron
    4. Uranium
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  19. Question 19

    What is the primary purpose of control rods in a nuclear reactor?
    1. Absorb neutrons
    2. Produce neutrons
    3. Cool the reactor
    4. Shield radiation
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  20. Question 20

    Who proposed the concept of nuclear binding energy?
    1. Enrico Fermi
    2. Niels Bohr
    3. Ernest Rutherford
    4. Albert Einstein
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