JEE Questions for Chemistry Chemical Bonding And Molecular Structure Quiz 2 - MCQExams.com

Which combination of atoms can form a polar covalent bond?
  • H and H
  • H and Br
  • N and N
  • Na and Br
Which metal has a greater tendency to form metal oxide ?
  • Cr
  • Fe
  • Al
  • Ca
Born-Haber cycle may be used to calculate
  • electronegativity
  • mass number
  • oxidation number
  • electron affinity
Which of the following is a favourable factor for cation formation ?
  • Low ionisation potential
  • High electron affinity
  • High electonegativity
  • Small atomic size
The nature of the bond in diamond is
  • ionic
  • covalent
  • metallic
  • coordinate covalent
The boiling point of p-nitrophenol is higher than that of o-nitrophenol because
  • NO2 group at p-position behave in a different way from that at o-position.
  • intramolecular hydrogen bonding exists in p-nitrophenol
  • there is intermolecular hydrogen bonding in p-nitrophenol
  • p-nitrophenol has a higher molecular weight than o-nitrophenol.
Which one of the following is the correct order of interactions ?
  • Covalent < hydrogen bonding < vander Waals < dipole-dipole
  • vander Waals < hydrogen bonding < dipole < covalent
  • vander Waals < dipole-dipole < hydrogen bonding < covalent
  • Dipole-dipole < vander Waals < hydrogen bonding < covalent.
Lattice energy of a solid increases, if
  • size of ions is small
  • charges of ions are small
  • ions are neutral
  • None of the above
Lattice energy of an ionic compound depends upon
  • charge on the ion and size of the ion
  • packing of ions only
  • size of the ion only
  • charge on the ion only
Which of the following structures is the most preferred and hence of lowest energy for SO3?

  • Chemistry-Chemical Bonding and Molecular Structure-1054.png
  • 2)
    Chemistry-Chemical Bonding and Molecular Structure-1055.png

  • Chemistry-Chemical Bonding and Molecular Structure-1056.png

  • Chemistry-Chemical Bonding and Molecular Structure-1057.png
Which of the following has covalent bond?
  • Na2 S
  • AlCl3
  • NaH
  • MgCl2
Strongest hydrogen bond is shown by
  • Water
  • Ammonia
  • Hydrogen fluoride
  • Hydrogen sulphide.
The number of angular and radial nodes of 4s orbital respectively are
  • 3, 1
  • 1, 2
  • 0,3
  • 2, 1
KO2 exhibits paramagnetic behaviour. This is due to the paramagnetic nature of
  • KO-
  • K+
  • O2
  • O-2
Which of the following molecules has the maximum dipole moment ?
  • CO2
  • CH4
  • NH3
  • NF3

Chemistry-Chemical Bonding and Molecular Structure-1060.png
  • 2.5
  • 2
  • 1.5
  • 1
As per molecular orbital theory, which can't exist in stable state?
  • H2
  • H+2
  • H-2
  • He2
Which of the following is a polar molecule ?
  • SF4
  • SiF4
  • XeF4
  • BF3
Which one of the following is paramagnetic?
  • N2
  • NO
  • CO
  • O3

Chemistry-Chemical Bonding and Molecular Structure-1061.png
  • 1
  • 1.5
  • 2
  • 2.5
The number of nodal planes present in σ*s -antibonding orbitals is
  • 1
  • 2
  • 0
  • 3
RbO2 is
  • peroxide and paramagnetic
  • peroxide and diamagnetic
  • superoxide and paramagnetic
  • superoxide and diamagnetic
From the molecular orbital theory, one can show that the bond order in F2 molecule as
  • 2
  • 1
  • 3
  • 4
The species having bond order different from that in CO is
  • NO-
  • NO+
  • CN-
  • N2
Among the following, the paramagnetic compound is
  • Na2O2
  • O3
  • N2O
  • KO2
Which of the following species exhibits the diamagnetic behaviour?

  • Chemistry-Chemical Bonding and Molecular Structure-1063.png
  • 2)
    Chemistry-Chemical Bonding and Molecular Structure-1064.png
  • O2
  • NO
For a stable molecule, the value of bond order must be
  • there is no relationship between stability and bond order
  • zero
  • positive
  • negative
Which of the following is paramagnetic with bond order 0.5 ?
  • F2
  • 2)
    Chemistry-Chemical Bonding and Molecular Structure-1065.png
  • N2

  • Chemistry-Chemical Bonding and Molecular Structure-1066.png
  • B2
Which of the following molecules/ions does not contain unpaired electrons ?

  • Chemistry-Chemical Bonding and Molecular Structure-1067.png
  • B2

  • Chemistry-Chemical Bonding and Molecular Structure-1068.png
  • O2
Which of the following species has a bond order other than 3?
  • CO
  • CN-
  • NO+

  • Chemistry-Chemical Bonding and Molecular Structure-1069.png
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