Practice test

Radioactivity and nuclear energy - Test Set 7

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

    The disintegration constant (λ) is related to half-life (T½) by which formula?
    1. λ = T½ × log 2
    2. λ = 1/T½
    3. λ = 0.693 / T½
    4. λ = T½ / 0.693
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  2. Question 2

    What is the charge of an alpha particle?
    1. +1
    2. +2
    3. 0
    4. –1
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  3. Question 3

    The term "chain reaction" in nuclear physics refers to:
    1. Fission reactions multiplying via released neutrons
    2. Electrons orbiting in shells
    3. Reaction with no energy release
    4. Fusion of isotopes
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  4. Question 4

    What type of shielding is needed to stop gamma rays effectively?
    1. Paper
    2. Thin plastic
    3. Aluminium foil
    4. Thick lead or concrete
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  5. Question 5

    Which of the following isotopes is used in food irradiation?
    1. Cobalt-60
    2. Gallium-67
    3. Sodium-24
    4. Iodine-131
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  6. Question 6

    Nuclear power plants produce energy through:
    1. Chemical combustion
    2. Nuclear fission
    3. Nuclear fusion
    4. Geothermal heat
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  7. Question 7

    Which of the following radioactive elements is known for its strong luminescence and historical use in luminous paints?
    1. Cobalt
    2. Iodine
    3. Radium
    4. Technetium
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  8. Question 8

    The principle of a smoke detector commonly uses the alpha-emitting isotope:
    1. Americium-241
    2. Radium-226
    3. Plutonium-239
    4. Uranium-238
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  9. Question 9

    Which of the following is a naturally occurring radioactive element?
    1. Iron
    2. Gold
    3. Uranium
    4. Copper
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  10. Question 10

    Which of the following is a common application of gamma rays in industry?
    1. Welding of metals
    2. Sterilization of medical instruments and food products
    3. Production of X-rays
    4. Magnetic Resonance Imaging (MRI)
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  11. Question 11

    What is the SI unit of radioactivity?
    1. Becquerel
    2. Curie
    3. Faraday
    4. Rutherford
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  12. Question 12

    Which of the following is used as 'a fissionable fuel' in a nuclear reactor?
    1. U208
    2. U235
    3. Pu229
    4. Pu115
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  13. Question 13

    For which of the following fields did Madam Curie win the Nobel Prize?
    1. Physics and Chemistry
    2. Physics and Astronomy
    3. Physics and Meteorology
    4. Chemistry and Biology
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  14. Question 14

    Which of the following is used in the treatment of cancer?
    1. An isotope of copper
    2. An isotope of uranium
    3. An isotope of cobalt
    4. An isotope of iodine
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  15. Question 15

    Which radioisotope is used for the treatment of metastatic bone cancer?
    1. Carbon-14
    2. Strontium-89
    3. Iodine-131
    4. Phosphorous-32
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  16. Question 16

    Which of the following is not a radioactive element?
    1. Plutonium
    2. Titanium
    3. Uranium
    4. Thorium
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  17. Question 17

    Marie Curie received the Nobel Prize for whose discovery?
    1. Uranium
    2. Plutonium
    3. Radium
    4. Turum
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  18. Question 18

    What is the chemical bond in which molecules are formed by combining atoms?
    1. nuclear force
    2. short range force
    3. electrostatic force
    4. gravitational force
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  19. Question 19

    Who invented radioactivity?
    1. Henri Becquerel
    2. Heinrich Hertz
    3. James Clerk Maxwell
    4. Max Planck
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  20. Question 20

    Henri Becquerel is associated with the discovery of
    1. Genetics
    2. Radioactivity
    3. Inductance
    4. Conductivity
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