B.Sc. T.Y. Sem-VI Paper:Atomic And Molecular Physics (Test Paper)

30 Questions | Total Attempts: 31

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B.Sc. T.Y. Sem-VI Paper:Atomic And Molecular Physics (Test Paper)

Dr. Mahajan G. R. Head & Assistant Professor Department of Physics Shri Datta Arts, Commerce and Science College Hadgaon Tq: Hadgaon Dist: Nanded


Questions and Answers
  • 1. 
    When two light nuclei combine to form a heavier nucleus, the process is said to be
    • A. 

      Nuclear fusion

    • B. 

      Nuclear fission

    • C. 

      Nuclear power

    • D. 

      Nuclear transmutation

  • 2. 
    _________ is usually expressed in a unit of Nuclear binding energy.
    • A. 

      Mev

    • B. 

      Ev

    • C. 

      Kev

    • D. 

      Joules

  • 3. 
    Which of the following is correct during fusion of hydrogen into helium:
    • A. 

      Mass is increased

    • B. 

      Mass is reduced

    • C. 

      Energy is absorbed

    • D. 

      Energy is released

  • 4. 
    The mass will______, when the energy is released from a system.
    • A. 

       Increases 

    • B. 

       Decreases

    • C. 

       Constant

    • D. 

      Zero

  • 5. 
    Which of the following is correct in the case of One atomic mass unit (AMU) is equal to
    • A. 

       1.66 x 10^-20 g

    • B. 

       1.66 x 10^-24 g

    • C. 

       1.66 x 10^-22 g

    • D. 

       1.66 x 10^-26 g

  • 6. 
    During the fission, what is the mass of products-
    • A. 

       Equal to the original nucleus

    • B. 

       More than the original nucleus

    • C. 

       less than the original nucleus

    • D. 

      Both B and C 

  • 7. 
    A nuclear fission produces energy of following order in MeV
    • A. 

      20

    • B. 

      200

    • C. 

      2000

    • D. 

      20000

  • 8. 
    Which of the following is the heaviest
    • A. 

      Neutron

    • B. 

      Proton

    • C. 

      Atom

    • D. 

      Electron

  • 9. 
    During natural radioactivity unstable nucleus disintegrates to become more…
    • A. 

      Stable

    • B. 

      Unstable

    • C. 

      Excited

    • D. 

      Unexcited

  • 10. 
      The most abundant isotope of uranium on earth is
    • A. 

      U233

    • B. 

      U235

    • C. 

      U234

    • D. 

      U238

  • 11. 
    Which of the following type of radiation does not originate within the nucleus?
    • A. 

      Alpha

    • B. 

      Beta

    • C. 

      Gamma

    • D. 

      X-rays

  • 12. 
    Cadmium rods are used in a nuclear reactor
    • A. 

      For promoting chain reaction

    • B. 

      For creating more neutrons

    • C. 

      For controlling the operation of the Nuclear reactor

    • D. 

      None of these

  • 13. 
    Graphite and heavy water are two common moderators used in a nuclear reactor. The function of the moderator is to
    • A. 

      Slow down neutrons

    • B. 

      Absorb neutrons

    • C. 

      Cool the reactor

    • D. 

      Arrest the chain reaction

  • 14. 
    The splitting of lines in to group under the effect of electric filed or magnetic filed is called  
    • A. 

      Zeeman effect

    • B. 

      Bohrs effect

    • C. 

      Magnetic effect

    • D. 

      Heinsenbergs Effect

  • 15. 
    The different types of energies associated with a molecule are
    • A. 

      Electronic energy

    • B. 

      Vibrational energy

    • C. 

      Rotational energy

    • D. 

      All of the mentioned

  • 16. 
    During the motion, if the center of gravity of molecule changes, the molecule possess
    • A. 

      Electronic energy

    • B. 

      Rotational energy

    • C. 

      Translational energy

    • D. 

      Vibrational energy

  • 17. 
    Which of the following is an application of molecular spectroscopy?
    • A. 

      Structural investigation

    • B. 

      Basis of understanding of colors

    • C. 

      Study of energetically excited reaction products

    • D. 

      All of the mentioned

  • 18. 
    Most stars are composed of
    • A. 

      mostly iron in their core

    • B. 

      About 3/4 hydrogen and 1/4 helium.

    • C. 

      About 1/4 hydrogen and 3/4 helium.

    • D. 

      Equal parts hydrogen and helium.

  • 19. 
    Raman effect is scattering of ________
    • A. 

       Atoms

    • B. 

      Molecules

    • C. 

      Protons

    • D. 

      Photons

  • 20. 
    The splitting of spectral lines due to electric filed is known as 
    • A. 

      Zeeman effect

    • B. 

      Molecular effect

    • C. 

      Stark effect

    • D. 

      Electromagnetic effect

  • 21. 
    Which quantum numbers gives the shell to which the electron belongs
    • A. 

      N

    • B. 

      L

    • C. 

      M

    • D. 

      S

  • 22. 
    What is the maximum number of electrons in a shell?
    • A. 

      N

    • B. 

      2n

    • C. 

      N2

    • D. 

      2n2

  • 23. 
    Which of the following is the correct expression for the orbital angular momentum?
    • A. 

      (l+1)1/2

    • B. 

      [n(l +1)]1/2

    • C. 

      [ l (l +1)]1/2

    • D. 

      [m (l +1)]1/2

  • 24. 
    The total value of the magnetic quantum number are _______________
    • A. 

      2n

    • B. 

      2l

    • C. 

      2n + 1

    • D. 

      2l + 1

  • 25. 
    EM waves varies from ______ to ________
    • A. 

      Meters to nano-meters

    • B. 

      Nano to micro-meters

    • C. 

      Meters to micro-meters

    • D. 

      Centimeters to nano-meters

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