1.

    The Bohr model is not applicable to which of the following?

    A

    Hydrogen atom

    B

    Singly ionized helium

    C

    Doubly ionized lithium

    D

    Helium atom

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Atoms
    🎯Topic:Bohr'S Model Of Atom
    PYQ YEAR: 2020
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Bohr Model, Atomic Structure

    Related Questions

    1.

    In the Bohr model, the potential energy (PE) of an electron is twice its total energy (TE). If the kinetic energy is K, what is the value of TE?

    A

    -K

    B

    K

    C

    2K

    D

    -2K

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Atoms
    🎯Topic:Bohr'S Model Of Atom
    PYQ YEAR: 2018
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Bohr's Model, Atomic Structure, Energy Levels

    2.

    Which of the following correctly represents the relationship between the kinetic energy (KE), potential energy (PE), and total energy (TE) of an electron in a Bohr orbit?

    A

    TE = KE + PE

    B

    TE = 2KE + PE

    C

    TE = -KE

    D

    TE = KE - 2PE

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Atoms
    🎯Topic:Bohr'S Model Of Atom
    PYQ YEAR: 2018
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Bohr's Model, Atomic Structure, Energy Levels

    3.

    The de-Broglie wavelength of an electron in the first Bohr orbit is

    A

    Equal to one fourth the circumference of the first orbit

    B

    Equal to half the circumference of the first orbit

    C

    Equal to twice the circumference of the first orbit

    D

    Equal to the circumference of the first orbit

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Atoms
    🎯Topic:Bohr'S Model Of Atom
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :de Broglie wavelength, Bohr's atomic model, circumference

    4.

    The wavelength of the last line of the Balmer series is observed to be 364.6 nm. Calculate the Rydberg constant (in mβˆ’1m^{-1}).

    A

    1.097 x 10^7 m^-1

    B

    2.194 x 10^7 m^-1

    C

    0.5485 x 10^7 m^-1

    D

    4.388 x 10^7 m^-1

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Atoms
    🎯Topic:Bohr'S Model Of Atom
    PYQ YEAR: 2016
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :3 mins
    πŸ”„Ncert Concepts :Atomic Structure, Balmer Series, Rydberg Constant

    5.

    The de-Broglie wavelength of an electron in the first Bohr orbit is

    A

    Equal to one fourth the circumference of the first orbit

    B

    Equal to half the circumference of the first orbit

    C

    Equal to twice the circumference of the first orbit

    D

    Equal to the circumference of the first orbit

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Atoms
    🎯Topic:Bohr'S Model Of Atom
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :de-Broglie wavelength, Bohr model, quantization of angular momentum

    6.

    The ratio of the shortest wavelength in the Lyman series to the longest wavelength in the Balmer series of hydrogen spectrum is:

    A

    5/36

    B

    5/27

    C

    1/3

    D

    9/4

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Atoms
    🎯Topic:Bohr'S Model Of Atom
    PYQ YEAR: 2015
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :3 mins
    πŸ”„Ncert Concepts :Atomic Structure, Hydrogen Spectrum

    7.

    The Bohr model's assumption of quantized electron orbits is invalid for:

    A

    H

    B

    He2+He^{2+}

    C

    Be2+Be^{2+}

    D

    Li+Li^+

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Atoms
    🎯Topic:Bohr'S Model Of Atom
    PYQ YEAR: 2020
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Bohr model, Atomic Structure

    8.

    The radius of hydrogen atom in its ground state is 5.3  imes  10βˆ’11  m5.3\,\, imes \,\,{10^{ - 11}}\,\,m. After collision with an electron it is found to have a radius of 21.2  imes  10βˆ’11  m21.2\,\, imes \,\,{10^{ - 11}}\,\,m. What is the principal quantum number nn of the final state of the atom

    A

    n=4n = 4

    B

    n=2n = 2

    C

    n=16n = 16

    D

    n=3n = 3

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Atoms
    🎯Topic:Bohr'S Model Of Atom
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Bohr's model, atomic radius, principal quantum number

    9.

    The extreme wavelengths of Paschen series are

    A

    0.365  μm0.365\,\,\mu m and 0.565  μm0.565\,\,\mu m

    B

    0.818  μm0.818\,\,\mu m and 1.89  μm1.89\,\,\mu m

    C

    1.45  μm1.45\,\,\mu m and 0.04  μm0.04\,\,\mu m

    D

    0.27  μm0.27\,\,\mu m and 7.43  μm7.43\,\,\mu m

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Nuclei
    🎯Topic:Bohr'S Model Of Atom
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :3 mins
    πŸ”„Ncert Concepts :Hydrogen spectrum, Paschen series, Rydberg formula, wavelength calculation

    10.

    The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom is:

    A

    1 :β€‰βˆ’21\,:\, - 2

    B

    1 : 11\,:\,1

    C

    2 :β€‰βˆ’12\,:\, - 1

    D

    1 :β€‰βˆ’11\,:\, - 1

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Atoms
    🎯Topic:Bohr'S Model Of Atom
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Bohr model, kinetic energy, potential energy, total energy

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