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

30 Questions | By Drgrmahajan | Last updated: Mar 15, 2022 | Total Attempts: 40

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

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