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GENERAL SCIENCE - NUCLEAR SCIENCE MCQs

Total Questions : 23 | Page 2 of 3 pages
Question 11. . 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 12. . 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 13. . The age of most ancient geological formations is estimated by
  1.    Ra - Si method
  2.    Potassium - argon method
  3.    C14 method
  4.    Uranium - lead method
 Discuss Question
Answer: Option D. -> Uranium - lead method
Question 14. . Who suggested that most of the mass of the atom is located in the nucleus?
  1.    Thompson
  2.    Bohr
  3.    Rutherford
  4.    Einstein
 Discuss Question
Answer: Option C. -> Rutherford
Question 15. . The dark lines in the solar spectrum are due to
  1.    absorption of corresponding wavelengths by the outer layers of the sun
  2.    destructive interference between waves of certain definite wavelengths
  3.    absorption of corresponding wavelengths by the prism used in the photograph
  4.    absence of corresponding wavelengths from the light emitted by the core of the sun
 Discuss Question
Answer: Option A. -> absorption of corresponding wavelengths by the outer layers of the sun
Question 16. . In an atomic nucleus, neutrons and protons are held together by
  1.    gravitational forces
  2.    exchange forces
  3.    coulombic forces
  4.    magnetic forces
 Discuss Question
Answer: Option B. -> exchange forces
Question 17. . Nuclear fission is caused by the impact of
  1.    neutron
  2.    proton
  3.    deuteron
  4.    electron
 Discuss Question
Answer: Option A. -> neutron
Question 18. . 'No two electrons in an atom can have the same set of four quantum numbers' is
  1.    Newton's law
  2.    Bohr's law
  3.    Aufbau principle
  4.    Pauli's exclusion principle
 Discuss Question
Answer: Option D. -> Pauli's exclusion principle
Question 19. . According to Avogadro's Hypothesis, the smallest particle of an element or a compound, that can exist independently, is called ____ .
  1.    a molecule
  2.    a cation
  3.    an anion
  4.    an atom
 Discuss Question
Answer: Option A. -> a molecule
Question 20. . Atoms of an element differ from those of all other elements in
  1.    atomic number and electronic configuration
  2.    number of neutrons and number of valence electrons
  3.    atomic number and number of valence electrons
  4.    number of neutrons and electronic configuration
 Discuss Question
Answer: Option A. -> atomic number and electronic configuration

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