Quiz  /  Nuclear Chemistry Class 12 MCQ Questions With Answers

  • 1. 
    Arrange in order of increasing ability to penetrate matter.

  • Beta, gamma, alpha
  • Alpha, gamma, beta
  • Gamma, beta, alpha
  • Alpha, beta, gamma

  • 2. 
    Carbon-12 has 98.2% abundance, carbon-13 has 1.7% abundance, and carbon-14 has 0.1% abundance. Which isotope contributes most to the average atomic mass?

  • Carbon-12
  • Carbon-13
  • Carbon-14
  • They all contribute equally

  • 3. 
    In the symbol 167N what the 7 stand for?

  • Mass number
  • Atomic number
  • Atomic mass
  • Number of neutrons

  • 4. 
    The name for protons and neutrons in nuclear chemistry is____

  • beta particles
  • positrons
  • nucleons
  • nuclides

  • 5. 
    The conversion of an atom of one element to an atom of another element is called ___________.

  • transmutation
  • Nuclear transmutation
  • Both A & B
  • None of these

  • 6. 
    Energetic electron from decomposed neutron

  • positron
  • radioactivity
  • alpha particle
  • gamma radiation
  • beta particle

  • 7. 
    Spontaneous emission from the nucleus of an atom

  • positron
  • radioactivity
  • alpha particle
  • gamma radiation
  • beta particle

  • 8. 
    The three types of nuclear radiation are _______ radiation, _________radiation, and _____________ radiation.

  • alpha, beta, and gamma
  • theta, beta, and kappa
  • alpha, beta, positron

  • 9. 
    What is the half-life of an isotope if after 20.0 days you have 4.0 grams remaining of a 64.0 grams sample?

  • 1.25 days
  • 5.0 days
  • 0.000305 days
  • 4.25 days

  • 10. 
    Which produces more energy--nuclear fission or nuclear fusion?

  • Fusion
  • Fission
  • They produce the same amount
  • It depends on the elements used

  • 11. 
    Which type of radiation has the greatest penetrating power?

  • Alpha
  • Beta
  • Gamma
  • Microwaves

  • 12. 
    In a nuclear reactor what absorbs fast moving neutrons?

  • generator
  • moderator
  • control rods
  • sheilding

  • 13. 
    The nuclear process occurring at a nuclear power plant.

  • Nuclear fusion
  • Nuclear fission
  • Combustion
  • Multiplication

  • 14. 
    Emitted helium nucleus

  • positron
  • radioactivity
  • alpha particle
  • gamma radiation
  • beta particle

  • 15. 
    In a(n) ___________, particles released from one nuclear reaction collide with other particles and cause more nuclear reactions.

  • nuclear fission reaction
  • nuclear fusion reaction

  • 16. 
    Which of the following is a fusion reaction?

  • hydrogen-2 and hydrogen-3 combining to form a helium-4 atom and a neutron
  • Carbon-14 emitting an alpha particle
  • uranium-235 absorbing a neutron and breaking into barium-141, krypton-92, and three neutrons
  • uranium-238 emitting a beta particle

  • 17. 
    The force that holds the protons and neutrons together in the nucleus of an atom is called __________.

  • Binding force
  • magnetic force
  • centripetal force
  • electrostatic force

  • 18. 
    The half-life of a radioactive isotope is 20.0 minutes. What is the total amount of a 1.00-gram sample of this isotope remaining after 1.00 hour?

  • 0.500g
  • 0.333g
  • 0.250g
  • 0.125g

  • 19. 
    Radiation detector that makes use of a gas-filled metal tube

  • scintillation counter
  • Geiger counter
  • neutron moderation
  • neutron absorption
  • film badge

  • 20. 
    In ___ _____reactions, small nuclei combine, producing a large nucleus and releasing large amounts of energy.

  • nuclear fission
  • nuclear fusion

  • 21. 
    In a nuclear reactor what slows down neutrons?

  • Control Rods
  • Moderator
  • Sheilding
  • The brakes

  • 22. 
    Detects radiation by counting electric pulses carried by gas atoms ionized by radiation

  • Geiger-Muller counter
  • Scintillation counter
  • Film badge
  • Radioactive detective

  • 23. 
    What is the equation for the positron emission by oxygen-16?

  • 168O + 0+1e --> 169F
  • 168O --> 42He + 126C
  • 168O --> 0-1e + 169F
  • 168O --> 0+1e + 167N

  • 24. 
    What does it mean when an element is radioactive?

  • atom emits radiation
  • nucei unstable due to uneven p to n ratio
  • nuclei changes to become stable
  • all of the above

  • 25. 
    What kind of a nuclear reaction changes the number of protons in the nucleus?

  • transmutation
  • radioactive decay
  • fusion and fission
  • All of them listed in the other answer choices

  • 26. 
    During fission, some of the nuclear mass is converted into

  • energy
  • heavier nuclei
  • critical mass
  • protons

  • 27. 
    What is NOT a characteristic of an alpha particle?

  • A negatively charged electron
  • Stopped by paper
  • A positively charged particle
  • Low penetration

  • 28. 
    If Thorium-234 undergoes a beta decay, What element will be left in its place?

  • Actinium-234
  • Thorium-233
  • Protactinium-234
  • Radium-230
Report Question
warning
access_time
  Time