Chemical Bonding and Molecular Structure MCQ

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• The structure of SF₄ is
  ক

  octahedral

  খ

  tetrahedral

  গ

  trigonal bipyramidal

  ঘ

  square planar
• The pair of compounds having the same hybridization for the central atom is
  ক

  XeF₄ and ^2-

  খ

  ^2- and ^2-

  গ

  Ni(CO)₄ and XeO₂F₂

  ঘ

  ³⁺ and ³⁺
• Sodium metal crystallizes in the body centred cubic lattice with cell edge a. The radius of the sodium atom is
  ক

  a/√2

  খ

  a√3/2

  গ

  a√3/4

  ঘ

  a/2√2
• The bond order for N₂, O₂, $${\text{N}}_2^ - $$, $${\text{O}}_2^ - $$ varies as
  ক

  N₂ > $${\text{N}}_2^ - $$ > O₂ > $${\text{O}}_2^ - $$

  খ

  N₂ > O₂ > $${\text{N}}_2^ - $$ > $${\text{O}}_2^ - $$

  গ

  O₂ > N₂ > $${\text{O}}_2^ - $$ > $${\text{N}}_2^ - $$

  ঘ

  $${\text{N}}_2^ - $$ > N₂ > $${\text{O}}_2^ - $$ > O₂
• The structures of O₃ and $${\text{N}}_3^ - $$ are
  ক

  linear and bent respectively

  খ

  both linear

  গ

  both bent

  ঘ

  bent and linear respectively
• Among the compounds Fe₃O₄, NiFe₂O₄ and Mn₃O₄
  ক

  NiFe₂O₄ and Mn₃O₄ are normal spinels

  খ

  Fe₃O₄ and Mn₃O₄ are normal spinels

  গ

  Fe₃O₄ and Mn₃O₄ are inverse spinels

  ঘ

  Fe₃O₄ and NiFe₂O₄ are inverse spinels
• The atomic radius (in cm) of an element with a body centred cubic unit cell of volume 75.8 cm³ mol^-1, molecular weight 137.3 and density 3.62 g cm^-3 is
  ক

  1.5 × 10^-8

  খ

  1.6 × 10^-8

  গ

  2.0 × 10^-8

  ঘ

  2.2 × 10^-8
• The compound (SiH₃)₃N is expected to be
  ক

  pyramidal and more basic than (CH₃)₃N

  খ

  planar and less basic than (CH₃)₃N

  গ

  pyramidal and less basic than (CH₃)₃N

  ঘ

  planar and more basic than (CH₃)₃N
• The coordination number of the Ba²⁺ ions in barium fluoride is 8. The coordination number of the fluoride ion is
  ক

  8

  খ

  4

  গ

  1

  ঘ

  2
• The ground state term for V³⁺ ion is
  ক

  ³F

  খ

  ²F

  গ

  ³P

  ঘ

  ²D
• Among the following molecules, the shortest bond length is to be found in
  ক

  C₂

  খ

  N₂

  গ

  O₂

  ঘ

  F₂
• NaCI is crystallized by slow evaporation of its aqueous solution at room temperature. The correct statement is
  ক

  the crystals will be non-stoichiometric

  খ

  the crystals should have Frenkel defects

  গ

  the percentage of defects in the crystals will depend on the concentration of the solution and its rate of evaporation

  ঘ

  the nature of defects will depend upon the concentration of the solution and its rate of evaporation
• The number of manganese ions in tetrahedral and octahedral sites, respectively in Mn₃O₄ are
  ক

  one Mn²⁺ and two Mn³⁺

  খ

  one Mn³⁺ and two Mn²⁺

  গ

  two Mn³⁺ and one Mn²⁺

  ঘ

  two Mn²⁺ and one Mn³⁺
• The shape of the molecule XeO₂F₂ is
  ক

  distorted tetrahedral

  খ

  square planar

  গ

  trigonal bipyramidal

  ঘ

  tetrahedral
• The bond angle of Cl₂O is
  ক

  smaller than of F₂O

  খ

  greater than that of H₂O

  গ

  smaller than that of H₂O

  ঘ

  same as that of F₂O
• The ground state term symbols for high spin d⁵s¹ and d⁵ configurations, respectively are
  ক

  ³S and ⁶S

  খ

  ⁶P and ³S

  গ

  ⁷S and ⁶S

  ঘ

  ⁷P and ⁶S
• The crystal structure of Pb₃O₄ contains
  ক

  octahedral and tetrahedral units

  খ

  only octahedral units

  গ

  octahedral arid pyramidal units

  ঘ

  octahedral and square planar units
• The point group of CIF₃ molecule and its corresponding number of irreducible representations are respectively
  ক

  C_3v and 4

  খ

  C_2v and 4

  গ

  C_3v and 3

  ঘ

  C_2v and 3
• On the basis of LCAO-MO theory, the magnetic characteristics of N₂ and $${\text{N}}_2^ + $$ are
  ক

  both diamagnetic

  খ

  both paramagnetic

  গ

  N₂ diamagnetic and $${\text{N}}_2^ + $$ paramagnetic

  ঘ

  N₂ paramagnetic and $${\text{N}}_2^ + $$ diamagnetic
• Icosahedral structure is generally exhibited by
  ক

  C

  খ

  Si

  গ

  Ge

  ঘ

  B
• The symmetry point group of the BF₃ molecule is
  ক

  C_3v

  খ

  D_3h

  গ

  C_2v

  ঘ

  D_2h
• The symmetry elements that are present in BF₃ are
  ক

  C₃, σ_v, σ_h, 3C₂

  খ

  C₃, 3C₂, S₂, σ_v

  গ

  C₃, 3C₂, σ_h, S₂

  ঘ

  C₃, σ_h, σ_v, i
• The hybrid orbitals used by bromine atom in BrF₃ are
  ক

  sp²

  খ

  sp³

  গ

  sp³d

  ঘ

  sp³d²
• The species which has a square planar structure is
  ক

  $${\text{BF}}_4^ - $$

  খ

  $${\text{FeCl}}_4^ - $$

  গ

  SF₄

  ঘ

  XeF₄
• Among the following, the isoelectronic and isostructural pair is
  ক

  CO₂ and SO₂

  খ

  SO₃ and SeO₃

  গ

  $${\text{NO}}_2^ + $$  and TeO₂

  ঘ

  $${\text{SiO}}_4^{4 - }$$  and $${\text{PO}}_4^{3 - }$$
• Which of the following statements about the molecule NOCl is correct?
  ক

  It has a linear structure

  খ

  It belongs to the point group C_s

  গ

  It does not have a dipole moment

  ঘ

  It is a chiral molecule
• Band theory predicts that magnesium is an insulator. However, in practice it acts as a conductor due to
  ক

  presence of filled 3s - orbital

  খ

  overlap of filled 2p and filled 3s - orbital

  গ

  overlap of filled 3s and empty 3p - orbital

  ঘ

  presence of unfilled 3p - orbital
• The band structure in an n-type semiconductor is<br><img src="/images/question-image/engineering-chemistry/chemical-bonding-and-molecular-structure/1689828997-the-band-structure-in-an-n-type-semiconductor.png" title="Chemical Bonding and Molecular Structure mcq question image" alt="Chemical Bonding and Molecular Structure mcq question image">
  ক

  I

  খ

  II

  গ

  III

  ঘ

  IV
• Fe₃O₄ and Co₃O₄ are metal oxides having spinel structure. Considering their CFSFs, the correct statement regarding their structure is
  ক

  both have normal spinel structure

  খ

  both have inverse spinel structure

  গ

  Fe₃O₄ has normal and Co₃O₄ has inverse spinel structure

  ঘ

  Fe₃O₄ has inverse and Co₃O₄ has normal spinel structure
• CaTiO₃ has a perovskite crystal structure. The coordination number of titanium in CaTiO₃ is
  ক

  9

  খ

  6

  গ

  3

  ঘ

  12