Atomic Spectra MCQs for MDCAT Practice

Physics section, Atomic Spectra chapter. Sample questions from past PMC papers.

1. Question 1
   The angular momentum of the hydrogen atom in ground state is equal to
   • A.h/2π
   • B.2h/2π
   • C.π/2h
   • D.2π/h
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2. Question 2
   X-rays can be produced by bombardment of ____ on target material:
   • A.Protons
   • B.Neutrons
   • C.Alpha particles
   • D.Electrons
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3. Question 3
   The energy of a Kα characteristic X-ray depends on:
   • A.Voltage applied across the tube
   • B.Atomic number of the target
   • C.Current in the filament
   • D.Thickness of the target
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4. Question 4
   If electronic transitions in the hydrogen atom terminate in the second orbit, the emitted series is known as:
   • A.Brackett series
   • B.Paschen series
   • C.Lyman series
   • D.Balmer series
   • E.Pfund series
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5. Question 5
   X-rays were discovered by
   • A.Becquerel
   • B.Roentgen
   • C.Marie Curie
   • D.Von Laue
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6. Question 6
   Bohr's theory was modified by
   • A.Rutherford and Soddy
   • B.Planck
   • C.Hund
   • D.Sommerfield
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7. Question 7
   The sum of absorption and transmission of light in a medium is equal to?
   • A.Incident light
   • B.Reflected light
   • C.Any of a or b
   • D.None of these
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8. Question 8
   How much heavier is the H-atom as compared to electrons?
   • A.1937
   • B.1737
   • C.1877
   • D.1837
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