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MCQs

Total Questions : 622 | Page 56 of 63 pages
Question 551. When electron is brought from infinity to radius r its energy
  1.    increases
  2.    decreases
  3.    remains same
  4.    reflects
 Discuss Question
Answer: Option B. -> decreases
Answer: (b).decreases
Question 552. N+l value of 5s orbital is
  1.    2
  2.    1
  3.    4
  4.    5
 Discuss Question
Answer: Option D. -> 5
Answer: (d).5
Question 553. Orbital motion was described in elliptical form by
  1.    Bohr
  2.    Sommerfeld
  3.    Rutherford
  4.    J Thomson
 Discuss Question
Answer: Option B. -> Sommerfeld
Answer: (b).Sommerfeld
Question 554. Mass of neutron in amu is
  1.    1.0073
  2.    1.0087
  3.    1.0098
  4.    1.0065
 Discuss Question
Answer: Option B. -> 1.0087
Answer: (b).1.0087
Question 555. Diffraction is a property of
  1.    waves
  2.    particles
  3.    solids
  4.    gases
 Discuss Question
Answer: Option A. -> waves
Answer: (a).waves
Question 556. Radioactive copper is used in treatment of
  1.    goiter
  2.    cancer
  3.    throat infection
  4.    fever
 Discuss Question
Answer: Option B. -> cancer
Answer: (b).cancer
Question 557. Radius of electron is inversely proportional to
  1.    velocity
  2.    square of velocity
  3.    density
  4.    square of density
 Discuss Question
Answer: Option B. -> square of velocity
Answer: (b).square of velocity
Question 558. Value of energy of electron for fourth orbit of hydrogen atom is
  1.    −328.32
  2.    −1313.31
  3.    −82.08
  4.    −145.92
 Discuss Question
Answer: Option C. -> −82.08
Answer: (c).−82.08
Question 559. Proton from paraffin can be expelled by
  1.    neutrons
  2.    protons
  3.    electrons
  4.    nucleus
 Discuss Question
Answer: Option A. -> neutrons
Answer: (a).neutrons
Question 560. Vacuum permittivity is represented by
  1.    ε
  2.    η
  3.    γ
  4.    λ
 Discuss Question
Answer: Option A. -> ε
Answer: (a).ε

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