JEE Questions for Chemistry Structure Of Atom Quiz 3 - MCQExams.com

The orbital angular momentum of an electron in 2s orbital is

  • Chemistry-Structure of Atom-7803.png
  • zero

  • Chemistry-Structure of Atom-7804.png

  • Chemistry-Structure of Atom-7805.png
The radius of hydrogen atom in the ground state is 0.53 Å. The radius of Li2+ ion (atomic number =in a similar state is
  • 0.17 Å
  • 0.265 Å
  • 0.53 Å
  • 1.06 Å
The number of electrons accommodated in an orbit with principal quantum number 2, is
  • 2
  • 6
  • 10
  • 8
Which of the following is not possible ?
  • n = 2, l = 1, m = 0
  • n = 2, l = 0, m = -1
  • n = 3, l = 0, m = 0
  • n = 3, l = 1, m = -1
The orbital angular momentum of an electron in a d - orbital is

  • Chemistry-Structure of Atom-7809.png
  • 2)
    Chemistry-Structure of Atom-7810.png

  • Chemistry-Structure of Atom-7811.png

  • Chemistry-Structure of Atom-7812.png
Which of the following sets of quantum numbers is correct for an electron in 4 f -orbital ?
  • n = 4, l = 3, m = + 4, s = + 1/2
  • n = 4, l = 4, m = - 4, s = - 1/2
  • n = 4, l = 3, m = + 1, s = + 1/2
  • n = 3, l = 2, m = -2, s = + 1/2
Which combinations of quantum numbers n, l, m and s for the electron in an atom does not provide a permissible solution of the wave equation?
  • 3, 2, 1, 1/2
  • 3, 1, 1, - (1/2)
  • 3, 3, 1, - (1/2)
  • 3, 2, -2, 1/2
If ionization potential for hydrogen atom is 13.6 eV, then ionization potential for He+ will be
  • 54.4 eV
  • 6.8 eV
  • 13.6 eV
  • 24.5 eV
Non-directional orbital is
  • 4p
  • 4d
  • 4f
  • 3s
In a multi-electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric fields ?
I . n = 1, l = 0, m = 0
II. n = 2, l = 0, m = 0
III. n = 2, l = 1, m = 1
IV n = 3, l = 2, m = 1
V. n = 3, l = 2, m = 0
  • IV and V
  • III and IV
  • II and III
  • I and II
Which of the following statements in relation to the hydrogen atom is correct ?
  • 3s, 3p and 3d-orbitals all have the same energy
  • 3s and 3p-orbitals are of lower energy than 3d-orbital
  • 3p-orbital is lower in energy than 3d-orbital
  • 3s-orbital is lower in energy than 3p-orbital
Which of the following is non-permissible ?
  • n = 4, l = 3, m = 0
  • n = 4, l = 2, m = 1
  • n = 4, l = 4, m = 1
  • n = 4, l = 0, m = 0
The electronic configuration of Cu is
  • [Ne] 3s2, 3p6, 3d9, 42
  • [Ne] 3s2, 3p6, 3d10, 4s1
  • [Ne]3s2, 3p6, 3d3, 4s2, 4p6
  • [Ne]3s2, 3p6, 3d5, 4s2, 4p4
The electrons identified by quantum numbers n and l
I. n = 4, l = 1
II. n = 4, l = 0
III. n = 3, l = 3
IV . n = 3, l = 1
can be placed in order of increasing energy as
  • (< (< (< (1)
  • (< (< (< (1)
  • (< (< (< (3)
  • (< (< (< (4)
For the valency electron in copper, the four quantum numbers are
  • n = 4, l = 0, m = 0, s = 1/ 2
  • n = 4, l = 0, m = + 2, s = 1/ 2
  • n = 4, l = 1, m = +2, s = 1/ 2
  • n = 4, l = 1, m = 0, s = 1/ 2
Which of the following laws will represent the pairing of electron in a subshell after each orbital is filled with one electron ?
  • Pauli's exclusion principle
  • Hund's rule
  • Heisenberg's uncertainty principle
  • Hess law
The representation of the ground state electronic configuration of He by box - diagram as ↑↑ is wrong because it violates
  • Heisenberg's uncertainty principle
  • Bohr's quantization theory of angular momenta
  • Pauli exclusion principle
  • Hund's rule
The number of unpaired electrons in Fe3+ ion is
  • 3
  • 1
  • 5
  • 2

Chemistry-Structure of Atom-7818.png

  • Chemistry-Structure of Atom-7819.png
  • 2)
    Chemistry-Structure of Atom-7820.png

  • Chemistry-Structure of Atom-7821.png

  • Chemistry-Structure of Atom-7822.png
The measurement of the electron position if associated with an uncertainty in momentum, which is equal to 1 × 10–18 g cm s– 1 . The uncertainty in electron velocity is, [2008] (mass of an electron is 9 × 10– 28 g)
  • 1 × 1011 cm s– 1
  • 1 × 109 cm s– 1
  • 1 × 106 cm s– 1
  • 1 × 105 cm s– 1
The electronic configuration of the oxide ion is much most similar to the electronic configuration of the
  • sulphide ion
  • nitride ion
  • oxygen atom
  • nitrogen atom
What is the atomic number of the element with M2+ ion having electronic configuration [Ar] 3d 8 ?
  • 25
  • 28
  • 27
  • 26
Which of the following has the maximum number of unpaired ' d' electrons ?
  • Zn2+
  • Fe2+
  • Ni3+
  • Cu+
What is the electronic configuration of Mn2+ ?
  • [Ne] 3d5, 4s0
  • [Ar] 3d5, 4s2
  • [Ar] 3d5, 4s0
  • [Ne] 3d5, 4s2
Which is not in accordance to Aufbau principle ?

  • Chemistry-Structure of Atom-7829.png
  • 2)
    Chemistry-Structure of Atom-7830.png

  • Chemistry-Structure of Atom-7831.png

  • Chemistry-Structure of Atom-7832.png
Cr has electronic configuration as
  • 3s2 3p6 3d 4 4s1
  • 3s2 3p6 3d 5 4s1
  • 3s2 3p6 3d 6
  • None of these
The atomic numbers of elements X, Y and Z are 19, 21 and 25 respectively. The number of electrons present in the M-shell of these elements follow the order
  • Z > X > Y
  • X > Y > Z
  • Z > Y > X
  • Y > Z > X
Which diagram best represents the appearance of the line spectrum of atomic hydrogen in the visible region ?

  • Chemistry-Structure of Atom-7835.png
  • 2)
    Chemistry-Structure of Atom-7836.png

  • Chemistry-Structure of Atom-7837.png

  • Chemistry-Structure of Atom-7838.png

  • Chemistry-Structure of Atom-7839.png
The ionisation energy of hydrogen atom is 13.6 eV. What will be the ionisation energy of He+ ?
  • 13.6 eV
  • 54.4 eV
  • 122.4 eV
  • Zero
The wavelength of the radiation emitted, when in a hydrogen atom electron falls from infinity to stationary state 1, would be (Rydberg constant =1.097 × 10-7 m-1)
  • 91 nm
  • 192 nm
  • 406 nm
  • 9.1 × 10-8 nm
0:0:1


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