General Science - Nuclear Science(General Knowledge ) Questions and Answers

Question 1.  Which of the following is used as a moderator in nuclear reactor?
  1.    Thorium
  2.    Graphite
  3.    Radium
  4.    Ordinary water
Explanation:-
Answer: Option B. -> Graphite
Question 2.  Isotopes are separated by
  1.    crystallisation
  2.    sublimation
  3.    distillation
  4.    filtration
Explanation:-
Answer: Option C. -> distillation
Question 3.  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
Explanation:-
Answer: Option C. -> conversion of mass into energy
Question 4.  
Which among the following is a positively charged particle emitted by a radioactive element?
  1.    Beta ray
  2.    Alpha ray
  3.    Cathode ray
  4.    Gamma ray
Explanation:-
Answer: Option B. -> Alpha ray
Question 5.  Atoms are composed of
  1.    electrons and protons
  2.    electrons only
  3.    protons only
  4.    electrons and nuclei
Explanation:-
Answer: Option D. -> electrons and nuclei
Question 6.  The wavelength of X-rays is of the order of
  1.    10 micron
  2.    1 angstrom
  3.    1 cm
  4.    1 m
Explanation:-
Answer: Option B. -> 1 angstrom
Question 7.  Mesons are found in
  1.    Laser beam
  2.    X-rays
  3.    Gamma rays
  4.    Cosmic rays
Explanation:-
Answer: Option D. -> Cosmic rays
Question 8.  
Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material?
  1.    Thorium
  2.    Radium
  3.    Plutonium
  4.    Radan
Explanation:-
Answer: Option A. -> Thorium
Question 9. . What is the wavelength of visible spectrum?
  1.    8500 - 9800 angstrom
  2.    7800 - 8000 angstrom
  3.    3900 - 7600 angstrom
  4.    1300 - 3000 angstrom
Explanation:-
Answer: Option C. -> 3900 - 7600 angstrom
Question 10.  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
Explanation:-
Answer: Option C. -> Baryons, Mesons, Leptons
© Lakshya_Education.com, All Right Reserved.
Contact Us services