JEE Questions for Chemistry Structure Of Atom Quiz 4 - MCQExams.com

The energy of second Bohr orbit of the hydrogen atom is -328 kJ mol-1; hence the energy of fourth Bohr orbit would be
  • -41 KJ mol-1
  • -1312 KJ mol-1
  • -164 KJ mol-1
  • -82 KJ mol-1
The wavelength of a spectral line emitted by hydrogen atom in the Lyman series is 16/15R cm. What is the value of n2 ? (R = Rydberg constant)
  • 2
  • 3
  • 4
  • 1
The energy ratio of a photon of wavelength 3000 Å and 6000 Å is
  • 1 : 1
  • 2 : 1
  • 1 : 2
  • 1 : 4
According to Bohr's theory, the angular momentum of an electron in 5th orbit is

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  • 2)
    Chemistry-Structure of Atom-7847.png

  • Chemistry-Structure of Atom-7848.png

  • Chemistry-Structure of Atom-7849.png
Bohr model can explain
  • the solar spectrum
  • the spectrum of hydrogen molecule
  • spectrum of any atom or ion containing one electron only
  • the spectrum of hydrogen atom only
The energy of hydrogen atom in its ground state is - 13.6 eV. The energy of the level corresponding to the quantum number n = 5 is
  • - 5.4 eV
  • - 0.54 eV
  • - 2.72 eV
  • - 0.85 eV
For a Bohr atom angular momentum M of the electron is (n = 0,1, 2, .... )

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  • 2)
    Chemistry-Structure of Atom-7853.png

  • Chemistry-Structure of Atom-7854.png

  • Chemistry-Structure of Atom-7855.png
The velocity of electron in first orbit of H-atom as compared to the velocity of light is
  • 1/10 th
  • 1/100 th
  • 1/1000 th
  • same
The spectrum of He is expected to be similar to that of
  • H
  • Li+
  • Na
  • He+
2p – orbitals have
  • n = 1, l = 2
  • n = 1, l = 0
  • n = 2, l = 1
  • n = 2, l = 0.
Which of the following is not correct for electronic distribution in the ground state?

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  • 2)
    Chemistry-Structure of Atom-7859.png

  • Chemistry-Structure of Atom-7860.png

  • Chemistry-Structure of Atom-7861.png
The radius of atomic nucleus is of the order of
  • 10−12 m
  • 10−8 m
  • 10−15 m
  • 10−10 m.
Which of the following are isoelectronic with one another?
  • Na+ and Ne
  • K+ and O
  • Ne and O
  • Na+ and K+
Different lines in Lyman series of hydrogen spectrum lie in
  • Ultraviolet
  • Infrared
  • Visible
  • Far infrared
The symbol of the element whose atoms have the outer most electronic configuration 2s2, 2p3 is
  • N
  • Li
  • P
  • Na
The electron level which allows the hydrogen to absorb photons but not to emit is
  • 1s
  • 2s
  • 2p
  • 3d
Maximum number of electrons present in ‘N’ shell is
  • 18
  • 32
  • 2
  • 8
Bohr’s model can explain
  • the spectrum of hydrogen atom only
  • spectrum of atom or ion containing one electron only
  • the spectrum of hydrogen molecule
  • the solar spectrum.
Electromagnetic radiation with maximum wave length is
  • ultra–violet
  • radiowave
  • X–rays
  • Infrared
Which is correct statement about proton?
  • Proton is nucleus of deuterium
  • Proton is a–particle
  • Proton is ionized hydrogen molecule
  • Proton is ionized hydrogen.
Rutherford’s alpha particle scattering experiment eventually led to the conclusion that
  • mass and energy are related
  • electrons occupy space around the nucleus
  • neutrons are buried deep in the nucleus
  • the point of impact with matter can be precisely determined.
Which one of the following sets of quantum numbers represents an impossible arrangement?

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  • 2)
    Chemistry-Structure of Atom-7864.png

  • Chemistry-Structure of Atom-7865.png

  • Chemistry-Structure of Atom-7866.png
The triad of nuclei which is isotonic is

  • Chemistry-Structure of Atom-7867.png
  • 2)
    Chemistry-Structure of Atom-7868.png

  • Chemistry-Structure of Atom-7869.png

  • Chemistry-Structure of Atom-7870.png

Chemistry-Structure of Atom-7871.png

  • Chemistry-Structure of Atom-7872.png
  • 2)
    Chemistry-Structure of Atom-7873.png

  • Chemistry-Structure of Atom-7874.png

  • Chemistry-Structure of Atom-7875.png
The number of spherical nodes in 3p orbitals are
  • one
  • three
  • none
  • two
If r is the radius of the first orbit, the radius of nth orbit of H-atom is given by
  • rn2
  • rn
  • r/n
  • r2n2
Which of the following statements does not form a part of Bhor’s model of hydrogen atom?
  • Energy of the electrons in the orbits is quantized
  • The electron in the orbit nearest the nucleus has the lowest energy
  • Electrons revolve in different orbits around the nucleus
  • The position and velocity of the electrons in the orbit cannot be determined simultaneously.
If electron has spin quantum number of +1⁄2 and a magnetic quantum number –1, it cannot be present in
  • d–orbital
  • f–orbital
  • p–orbital
  • s–orbital.
Number of unpaired electrons in N2+ is
  • 2
  • 0
  • 1
  • 3
The spectrum of He+ is expected to be similar to that of
  • Hydrogen
  • Li+
  • Na
  • He
0:0:1


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