1.

    Work required to pull an electron from helium atom is 40 eV. Then the work required to pull both the electrons from the helium atom is

    A

    80 eV

    B

    84 eV

    C

    40 eV

    D

    94.4 eV

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Nuclei
    🎯Topic:Atomic Specta
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :3 mins
    πŸ”„Ncert Concepts :ionization energy, atomic structure, electron shielding

    Related Questions

    1.

    The wavelength of Lyman series is

    A

    43  imes  10967  cm\frac{4}{{3\,\, imes \,\,10967}}\,\,cm

    B

    34  imes  10967  cm\frac{3}{{4\,\, imes \,\,10967}}\,\,cm

    C

    4  imes  109673  cm\frac{{4\,\, imes \,\,10967}}{3}\,\,cm

    D

    34  imes  10967  cm\frac{3}{4}\,\, imes \,\,10967\,\,cm

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Atoms
    🎯Topic:Atomic Specta
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :3 mins
    πŸ”„Ncert Concepts :Rydberg formula, Hydrogen spectrum, Lyman series, Wavelength

    2.

    In a spectrum of hydrogen atom, the ratio of shortest wavelength in Lyman series to longest wavelength in Paschen series is

    A

    19\frac{1}{9}

    B

    91\frac{9}{1}

    C

    1367\frac{{136}}{7}

    D

    7144\frac{7}{{144}}

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Atoms
    🎯Topic:Atomic Specta
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :3 mins
    πŸ”„Ncert Concepts :Hydrogen Spectrum, Rydberg Formula, Wavelength Calculation, Series Limits

    3.

    In hydrogen atom, electron makes transition from n=4n = 4 to n=1n = 1 level. Recoil momentum of the HH atom will be

    A

    3.4  imes  10βˆ’27  Nβˆ’s3.4\,\, imes \,\,{10^{ - 27}}\,\,N - s

    B

    6.8  imes  10βˆ’27  Nβˆ’s6.8\,\, imes \,\,{10^{ - 27}}\,\,N - s

    C

    3.4  imes  10βˆ’24  Nβˆ’s3.4\,\, imes \,\,{10^{ - 24}}\,\,N - s

    D

    6.8  imes  10βˆ’24  Nβˆ’s6.8\,\, imes \,\,{10^{ - 24}}\,\,N - s

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Nuclei
    🎯Topic:Atomic Specta
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :3 mins
    πŸ”„Ncert Concepts :Energy of photon, Momentum of photon, Conservation of Momentum, Rydberg formula

    4.

    First Bohr radius of an atom with Z=82Z = 82 is RR. Radius of its third orbit is

    A

    9 R9\,R

    B

    6 R6\,R

    C

    3 R3\,R

    D

    RR

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Atoms
    🎯Topic:Atomic Specta
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Bohr radius, atomic structure

    5.

    First Bohr radius of an atom with Z=82Z = 82 is RR. Radius of its third orbit is

    A

    9 R9\,R

    B

    6 R6\,R

    C

    3 R3\,R

    D

    RR

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Nuclei
    🎯Topic:Atomic Specta
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Bohr radius, Atomic structure, Quantum numbers

    6.

    In Bohr’s model, if the atomic radius of the first orbit is r0{r_0}, then the radius of the fourth orbit is

    A

    r0{r_0}

    B

    4 r04\,{r_0}

    C

    r0/16{r_0}/16

    D

    16 r016\,{r_0}

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Atoms
    🎯Topic:Atomic Specta
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Bohr's model, atomic radius, quantization

    7.

    An electron jumps from the 4th{4^{{\rm{th}}}} orbit to the 2nd{2^{{\rm{nd}}}} orbit of hydrogen atom. Given the Rydberg’s constant R=105  cmβˆ’1R = {10^5}\,\,c{m^{ - 1}}. The frequency in HzHz of the emitted radiation will be

    A

    316  imes  105\frac{3}{{16}}\,\, imes \,\,{10^5}

    B

    316  imes  1015\frac{3}{{16}}\,\, imes \,\,{10^{15}}

    C

    916  imes  1015\frac{9}{{16}}\,\, imes \,\,{10^{15}}

    D

    34  imes  1015\frac{3}{4}\,\, imes \,\,{10^{15}}

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Atoms
    🎯Topic:Atomic Specta
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Rydberg formula, frequency of emitted radiation, atomic transitions

    8.

    First Bohr radius of an atom with Z=82Z = 82 is RR. Radius of its third orbit is

    A

    9 R9\,R

    B

    6 R6\,R

    C

    3 R3\,R

    D

    RR

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Nuclei
    🎯Topic:Atomic Specta
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Bohr radius, atomic structure

    9.

    When a hydrogen atom is raised from the ground state to an excited state

    A

    P.E.{\rm{P}}{\rm{.E}}{\rm{.}} increases and K.E.{\rm{K}}{\rm{.E}}{\rm{.}} decreases

    B

    P.E.{\rm{P}}{\rm{.E}}{\rm{.}}. decreases and K.E.{\rm{K}}{\rm{.E}}{\rm{.}} increases

    C

    Both kinetic energy and potential energy increase

    D

    Both K.E.{\rm{K}}{\rm{.E}}{\rm{.}} and P.E.{\rm{P}}{\rm{.E}}{\rm{.}} decrease

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Atoms
    🎯Topic:Atomic Specta
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Potential Energy, Kinetic Energy, Atomic Energy Levels, Hydrogen Atom

    10.

    For ionizing an excited hydrogen atom, the energy required (in eVeV) will be

    A

    A little less then 13.6{\rm{13}}{\rm{.6}}

    B

    13.6{\rm{13}}{\rm{.6}}

    C

    More than 13.6{\rm{13}}{\rm{.6}}

    D

    3.4{\rm{3}}{\rm{.4}} or less

    Question Tags
    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Nuclei
    🎯Topic:Atomic Specta
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :ionization energy, hydrogen atom energy levels, excitation

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