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NUCLEAR SCIENCE MCQs

Total Questions : 22 | Page 2 of 3 pages
Question 11.

The isotope of uranium capable of sustaining chain reaction is



  1.    U-235
  2.    U-245
  3.    U-239
  4.    U-238
 Discuss Question
Answer: Option A. -> U-235


Question 12.


Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material?



  1.    Thorium
  2.    Radium
  3.    Plutonium
  4.    Radan
 Discuss Question
Answer: Option A. -> Thorium


Question 13.


Which of the following has a least penetrating power?



  1.    All have same penetrating power
  2.    Beta Particles
  3.    Alpha particles
  4.    Gamma rays
 Discuss Question
Answer: Option C. -> Alpha particles


Question 14.


What is the wavelength of visible spectrum?



  1.    8500 - 9800 angstrom
  2.    7800 - 8000 angstrom
  3.    3900 - 7600 angstrom
  4.    1300 - 3000 angstrom
 Discuss Question
Answer: Option C. -> 3900 - 7600 angstrom


Question 15.

Which of the following shows the masses of the three elementary particles in decreasing order?



  1.    Leptons, Baryons, Mesons
  2.    Mesons, Baryons, Leptons
  3.    Baryons, Mesons, Leptons
  4.    Leptons, Mesons Baryons
 Discuss Question
Answer: Option C. -> Baryons, Mesons, Leptons


Question 16.


Mesons are found in



  1.    Laser beam
  2.    X-rays
  3.    Gamma rays
  4.    Cosmic rays
 Discuss Question
Answer: Option D. -> Cosmic rays


Question 17.


The wavelength of X-rays is of the order o



  1.    10 micron
  2.    1 angstrom
  3.    1 cm
  4.    1 m
 Discuss Question
Answer: Option B. -> 1 angstrom

1 angstrom = 1.0 x 10-10 meters


Question 18.


In an atomic explosion, enormous energy is released which is due to



  1.    conversion of chemical energy into heat energy
  2.    conversion of mechanical energy into nuclear energy
  3.    conversion of mass into energy
  4.    conversion of neutrons into protons
 Discuss Question
Answer: Option C. -> conversion of mass into energy


Question 19.

Atoms are composed of



  1.    electrons and protons
  2.    electrons only
  3.    protons only
  4.    electrons and nuclei
 Discuss Question
Answer: Option D. -> electrons and nuclei


Question 20.


Isotopes are separated by



  1.    crystallisation
  2.    sublimation
  3.    distillation
  4.    filtration
 Discuss Question
Answer: Option C. -> distillation


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