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
- 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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