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MCQs

Total Questions : 20 | Page 2 of 2 pages
Question 11. The lowest energy orbital among the following is
  1.    2s
  2.    2p
  3.    3s
  4.    3p
 Discuss Question
Answer: Option A. -> 2s
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 12. When Uranium-238 emits α particles it decays in to
  1.    Helium
  2.    Carbon
  3.    Thorium-234
  4.    Uranium-235
 Discuss Question
Answer: Option C. -> Thorium-234
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 13. Chlorine-35 exists in nature about
  1.    0.35
  2.    0.4
  3.    0.5
  4.    0.75
 Discuss Question
Answer: Option D. -> 0.75
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 14. D sub-shell can accommodate maximum
  1.    2 electrons
  2.    10 electrons
  3.    14 electrons
  4.    6 electrons
 Discuss Question
Answer: Option B. -> 10 electrons
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 15. The energy of emitted light is equal to
  1.    sum of energy levels
  2.    difference between energies of orbits
  3.    product of energies of orbits
  4.    none of above
 Discuss Question
Answer: Option B. -> difference between energies of orbits
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 16. α particles are
  1.    positively charged
  2.    doubly positively charged
  3.    negatively charged
  4.    doubly negatively charged
 Discuss Question
Answer: Option B. -> doubly positively charged
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 17. Atoms having same atomic number but different atomic mass are called
  1.    derivatives
  2.    isotopes
  3.    elements
  4.    isomers
 Discuss Question
Answer: Option B. -> isotopes
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 18. Protium has
  1.    one neutron
  2.    two neutrons
  3.    no neutron
  4.    3 neutrons
 Discuss Question
Answer: Option C. -> no neutron
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 19. Rutherford bombarded thin gold foil with
  1.    α particles
  2.    β particles
  3.    γ particles
  4.    neutrons
 Discuss Question
Answer: Option A. -> α particles
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 20. Iodine-123 is used to
  1.    diagnose thyroid problem
  2.    image the brain
  3.    kill cancer cells
  4.    trace the blood flow
 Discuss Question
Answer: Option B. -> image the brain
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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