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Atoms and Nuclei Test - 103

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Atoms and Nuclei Test - 103
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  • Question 1
    4 / -1
    When an electron in hydrogen atom is excited, from its 4th to 5th stationary orbit, the change in angular momentum of electron is (Planck\'s constant:h = 6.6 × 10–34 J-s)
    Solution

  • Question 2
    4 / -1
    The concept of stationary orbits was proposed by
  • Question 3
    4 / -1
    In a hydrogen atom, the distance between the electron and proton is 2.5 × 10–11 m. The electrical force ofattraction between them will be
    Solution

  • Question 4
    4 / -1
    If λmax is 6563 Å, then wavelength of second line for Balmer series will be
    Solution

  • Question 5
    4 / -1
    What will be the angular momentum of an electron, if energy of this electron in H–atom is –1.5 eV (in J-s)?
    Solution

  • Question 6
    4 / -1
    Who discovered spin quantum number?
  • Question 7
    4 / -1
    In Bohr\'s model, if the atomic radius of the first orbit is r0, then the radius of the fourth orbit is
    Solution

  • Question 8
    4 / -1
    In hydrogen atom, it the difference in the energy of the electron in n = 2 and n = 3 orbits is E, the ionization energy of hydrogen atom is
    Solution

  • Question 9
    4 / -1
    The first member of the Paschen series in hydrogen spectrum is of wavelength 18,800 Å. The shortwavelength limit of Paschen series is
    Solution

  • Question 10
    4 / -1
    The ratio of the longest to shortest wavelengths in Lyman series of hydrogen spectra is
    Solution

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