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MCQs

Total Questions : 622 | Page 7 of 63 pages
Question 61. Fast neutrons have energy which is more than
  1.    1.6MeV
  2.    1.2MeV
  3.    1.9MeV
  4.    6Mev
 Discuss Question
Answer: Option B. -> 1.2MeV
Answer: (b).1.2MeV
Question 62. Line spectrum is obtained from element or compound which is
  1.    volatilized
  2.    present in solid
  3.    present in liquid state
  4.    nitrogen spectrum
 Discuss Question
Answer: Option A. -> volatilized
Answer: (a).volatilized
Question 63. Schrodinger worked on
  1.    particle theory
  2.    wave theory
  3.    energy theory
  4.    kinetic energy
 Discuss Question
Answer: Option B. -> wave theory
Answer: (b).wave theory
Question 64. Millikan oil drop method was discovered in
  1.    1980
  2.    1909
  3.    1930
  4.    1967
 Discuss Question
Answer: Option B. -> 1909
Answer: (b).1909
Question 65. When target element used has more atomic number it produce X rays with
  1.    large wavelength
  2.    small wavelength
  3.    zero wavelength
  4.    none
 Discuss Question
Answer: Option C. -> zero wavelength
Answer: (c).zero wavelength
Question 66. Neutrons having energy less than 1eV are called
  1.    slow neutrons
  2.    fast neutrons
  3.    moderate neutrons
  4.    extra neutrons
 Discuss Question
Answer: Option A. -> slow neutrons
Answer: (a).slow neutrons
Question 67. Color of spectrum of sodium is
  1.    blue
  2.    purple
  3.    yellow
  4.    black
 Discuss Question
Answer: Option C. -> yellow
Answer: (c).yellow
Question 68. Radius of hydrogen first orbit is
  1.    0.529 angstrom
  2.    2.11 angstrom
  3.    13.22 angstrom
  4.    4.75 angstrom
 Discuss Question
Answer: Option A. -> 0.529 angstrom
Answer: (a).0.529 angstrom
Question 69. When electron jumps in n1 orbit series of spectral lines obtained is called
  1.    Balmer series
  2.    Pfund series
  3.    Brackett series
  4.    Lyman series
 Discuss Question
Answer: Option D. -> Lyman series
Answer: (d).Lyman series
Question 70. When alpha particle from nitrogen is ejected atom reduced is
  1.    Boron
  2.    nitrogen
  3.    Sulphur
  4.    carbon
 Discuss Question
Answer: Option A. -> Boron
Answer: (a).Boron

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