Chemical Bonding MCQs

By: Prof. Dr. Fazal Rehman | Last updated: May 23, 2025

1. : Which of the mentioned pairs are not isostructural?
(A) BF3 and NO3
(B) BF3 and NF3
(C) HO3 and NH3
(D) NH3 and NF3

2. : BF3 has zero dipole moment and NH3 has a net dipole moment. What do we want to say?
(A) NH3 is not a planar molecule; while BF3 is a planar molecule
(B) NH3 is a planar molecule; while BF3 is a planar molecule
(C) Fluorine is more electronegative than nitrogen
(D) Boron is more electronegative than nitrogen

3. : Which of the mentioned will exhibit variable electro-valency due to inert pair effect?
(A) Fe
(B) K
(C) Sn
(D) Ca

4. : Which of the mentioned facts is not true about ionic substances?
(A) Solids and crystalline
(B) Have high m.p. and b.p.
(C) Conduct electricity
(D) Exist as discrete molecules

5. : Which of the mentioned facts is not true about covalent substances?
(A) Soluble in polar solvents
(B) Have low m.p. and b.p.
(C) Soluble in non-polar solvents
(D) Exist as discrete molecules

6. : Which of the mentioned halides has lowest melting point?
(A) NaCl
(B) NaF
(C) NaI
(D) NaBr

7. : Ionic reactions primarily take place in which of the following?
(A) Gaseous state
(B) Non-aqueous solvents of low polarity
(C) Aqueous solutions and organic solvents of high polarity
(D) Solid state

8. : Which of the mentioned properties is not involved in the calculation of lattice energy of an ionic compound?
(A) Electronegativity
(B) Dissociation energy
(C) Ionization energy
(D) Electron affinity

9. : Born-Haber cycle is helpful and used to calculate which property of the ionic substances?
(A) Lattice energy
(B) Electronegativity
(C) % ionic character
(D) Ionic radius

10. : Which of the mentioned parameters is not true with respect to Fajan’s Rules?
(A) Small cations favour covalence
(B) Large cations favour covalence
(C) Large anions favour covalence
(D) High charge on cations/anions favour covalence

11. : Which halide of cesium will be highly ionic in nature?
(A) Fluoride
(B) Bromide
(C) Chloride
(D) Iodide

12. : Which of the mentioned silver halides is soluble in water due to polarization effect?
(A) Ag
(B) AgBr
(C) AgCl
(D) AgF

13. : Which of the statements is true with respect to chemical bonding?
14. : Which of the mentioned molecules is not angular in structure?
(A) HO
(B) SO
(C) CO
(D) O

15. : The forces responsible for dissolution of ionic compounds in water are
(A) Ion-dipole forces
(B) Covalent bonds
(C) Metallic bond
(D) Van der Waals forces

16. : Which of the mentioned molecules has trigonal planar geometry?
(A) NF3
(B) BF3
(C) O3
(D) NH3

17. : How is Pi bond formed?
(A) By the overlapping of atomic orbitals on internuclear axis
(B) By sidewise overlapping to half-filled p-orbitals
(C) By transference of electrons
(D) By overlapping of s-orbitals with p-orbitals

18. : Which of the mentioned molecules has trigonal bipyramidal geometry?
(A) CHCl3
(B) CCl4
(C) XeF5
(D) SF4

19. : Ionic compounds in general possess both
(A) High melting points and low-boiling points
(B) High melting point and non-directional bonds
(C) Directional bonds and low-boiling points
(D) High solubility in polar and non-polar solvents

20. : Which of the mentioned molecules has square pyramidal geometry?
(A) SF4
(B) BrF5
(C) CCl4
(D) PCl5

21. : Which of the mentioned is not a characteristic of covalent compounds?
(A) They ionize on dissolution in polar solvents
(B) They have low melting and boiling points
(C) Their molecules have definite geometry
(D) They are generally insoluble in water

22. : Which of the mentioned statements is true?
(A) A sigma bond is weaker than a pi bond
(B) There are four coordinate bonds in the Lewis structure of NH4+
(C) A single bond between two atoms cannot be a pi bond
(D) The covalent bond is directional in nature

23. : In which of the mentioned species are the bonds non-directional?
(A) NCl3
(B) BCl3
(C) BeCl2
(D) RbCl

24. : The geometry of the molecule is primarily decided by
(A) Bond pairs around the central atom
(B) Number of bond pairs as well as lone pairs around the central atom
(C) Number of Pi bonds around the central atom
(D) Number of lone pairs on central atom

25. : In the formation of H2O molecule, the oxygen atom makes use of
(A) sp-hybrid orbitals
(B) sp2-hybrid orbitals
(C) 2p-orbitals
(D) sp3-hybrid orbitals

26. : Which of the mentioned statement is false?
(A) CCl gives a white ppt. with AgNO3 solution
(B) Beryllium chloride is covalent
(C) Sodium hydride is ionic
(D) Bonds in NaCl are non-directional

27. : Which of the mentioned molecule does not contain the covalent bond between similar atoms?
(A) H2F2
(B) FO2
(C) N₂H
(D) H2O2

28. : Which of the following is a type of a chemical bond which is formed by the mutual sharing of electrons between combining atoms of the same or different elements?
(A) Ionic bond
(B) Metallic bond
(C) Coordinate covalent bond
(D) Covalent bond

29. : A molecule MX1 has a square planar shape. What is the number of non-bonding pairs of electrons around M?
(A) 5
(B) 4
(C) 2
(D) 0

30. : Which of the mentioned gaseous molecule is non-linear?
(A) XeF2
(B) HCN
(C) BeF2
(D) H₂O

31. : What is the geometry of IF7?
(A) Heptagonal
(B) Trigonal bipyramidal
(C) Icosehederal
(D) Pentagonal bipyramidal

32. : Which of the mentioned species has a linear shape?
(A) H₂O
(B) SO2
(C) ClO2
(D) I3⁻

33. : Which is the bond that is formed by complete transfer of electrons from electropositive to more electronegative atom?
(A) Co-ordinate bond
(B) Covalent bond
(C) Ionic bond
(D) Metallic bond

34. : The bond length is measured by
(A) Microwave spectroscopy
(B) Neutron diffraction
(C) X-ray diffraction
(D) All A, B, and C

35. : The bond order of B2 molecule is
(A) 2
(B) 1
(C) 2.5
(D) 3

36. : The polarity of bonds can lead to polarity of molecules and affect
(A) Solubility
(B) Boiling point
(C) Melting point
(D) All A, B, and C

37. : Which molecule has zero dipole moment?
(A) BCl3
(B) CO₂
(C) CICH3
(D) H2O

38. : Which of the mentioned species has a tetrahedral structure?
(A) SF4
(B) CCl4
(C) XeF4
(D) NO3⁻

39. : Which of the mentioned compound does not follow the octet rule?
(A) BrF3
(B) PBr3
(C) IBr
(D) CS2

40. : Which of the mentioned is not a strong interaction?
(A) Ionic bond
(B) Coordinate covalent bond
(C) Covalent bond
(D) van der Waals forces

41. : What is the bond angle of sp2 hybridization?
(A) 180°
(B) 109.5°
(C) 120°
(D) 160°

42. : PCl5 is an example of hybridization
(A) sp3
(B) d2sp3
(C) sp2
(D) dsp3

43. : In which fashion d2sp3 is oriented?
(A) Octahedral
(B) Tetrahedral
(C) Trigonal
(D) Trigonal bipyramidal

44. : The bond order gives the ______ valuable information
(A) Magnetic properties
(B) Bond dissociation energy and bond length
(C) Stability of the molecules or ions
(D) All A, B, and C

45. : What is the bond distance of Og molecule?
(A) 1.23 Å
(B) 1.21 Å
(C) 2.09 Å
(D) None of A, B, and C

46. : What is the bond order for BO molecule?
(A) 3.5
(B) 4.0
(C) 6.2
(D) 2.5

47. : Which is an example of Intra-molecular hydrogen bonding?
(A) O-hydroxy benzoic acid
(B) O-hydroxy benzaldehyde
(C) O-nitrophenol
(D) All A, B, and C

48. : Which of the mentioned statements is false with respect to hybridization?
(A) Hybrid orbitals are non-directional
(B) Atomic orbitals have comparable size
(C) Hybrid orbitals are directional
(D) Atomic orbitals have comparable energy

49. : In order to understand the nature of H-bond, which theory has been suggested?
(A) Valence bond approach
(B) Molecular orbital approach
(C) Electrostatic approach
(D) All A, B, and C

50. : Which hybridization corresponds to octahedral geometry?
(A) sp³d
(B) sp³
(C) d2sp³
(D) sp³d³

51. : Ethylene molecule involves hybridization
(A) dsp3
(B) sp3
(C) dsp2
(D) sp2

52. : H-bond has a preferred bonding direction like
(A) Covalent bond
(B) Ionic bond
(C) Coordinate bond
(D) None of A, B, and C

53. : H-bonding also exist in living system like
(A) Protein
(B) Enzymes
(C) DNA
(D) All A, B, and C

54. : Metals are generally ____ elements.
(A) Electronegative
(B) Electropositive
(C) Neutral
(D) None of A, B, and C

55. : Metals are
(A) Opaque
(B) Translucent
(C) Transparent
(D) None of A, B, and C

56. : Electron gas theory is able to explain which of the following?
(A) Metallic lusture and optical properties
(B) High electrical and thermal conductivity
(C) Malleability and ductility
(D) All A, B, and C

57. : Metallic bond is treated essentially as in character
(A) Ionic
(B) Polar
(C) Covalent
(D) Non polar

58. : Which of the mentioned molecules has linear geometry?
(A) XeF2
(B) BeCl2
(C) BeF2
(D) All A, B, and C

59. : SF has which geometry?
(A) Planar structure
(B) Square bipyramidal
(C) Tetrahedral structure
(D) Octahedral structure

60. : Which of the mentioned properties is associated with the covalent nature of the compound?
(A) It conducts electricity in molten state or aqueous state
(B) It has high m.p.
(C) It is a non-electrolyte
(D) It is a compound of a metal and non-metal

61. : Which of the following has a co-ordinate bond?
(A) BF3
(B) Al2Cl6
(C) NaCl
(D) O₂

62. : Which of the mentioned is not true about resonance?
(A) Structures should have comparable energy
(B) The position of nuclei should be fixed in all structures
(C) Number of lone pairs should be equal
(D) The species should be non-planar

63. : Which of the mentioned has zero dipole moment?
(A) NH3
(B) Cl2
(C) CHCL3
(D) NF3

64. : Which energy is the difference in energy between the resonance hybrid and the most stable structure?
(A) Binding energy
(B) Resonance energy
(C) Activation energy
(D) Lattice energy

65. : What is the state of hybridization of carbon in CO2?
(A) sp
(B) sp3
(C) sp2
(D) dsp2

66. : The percentage of s-character in the hybrid 3 orbitals sp, sp2 and sp3 follows which of the following pattern?
67. : Valence bond theory is also called as
(A) Electron pool theory
(B) Band theory
(C) Electron gas theory
(D) Electron pair theory

68. : A covalent bond which is formed between two atoms by the overlap of atomic orbitals along their axis is called
(A) Pi-bond
(B) Polar bond
(C) Sigma bond
(D) Non polar bond

69. : BCl3 is an example of hybridization
(A) sp
(B) sp3
(C) sp2
(D) d2sp³

70. : Which of the mentioned bonds has shorter bond length?
(A) Carbon-carbon triple bond
(B) Carbon-carbon double bond
(C) Carbon-chlorine bond
(D) Carbon-carbon single bond

71. : Which of the mentioned bonds will be non-polar?
(A) N-H
(B) O-H
(C) Cl-Cl
(D) C-H

72. : The pair of molecules or ions is ______, ________ having identical geometry.
(A) SiCl4, CCl4
(B) BF3, NH3
(C) CH2Cl2, CCl4
(D) BC3, PCl3

73. : Which of the mentioned statement is not true about VSEPR model?
(A) Total electron pairs around central atom remain at maximum distance
(B) Lone pair occupies more space than bond pair
(C) Lone pair occupies less than bond pair
(D) Double bond occupies more space than bond

74. : Which of the mentioned molecules has bond angle minimum?
(A) CO2
(B) H₂O
(C) NH3
(D) CH4

75. : An sp³ hybrid orbital contains which of the following character?
(A) 2/3 s character
(B) 1/2 s character
(C) 1/1 s character
(D) 3/4 s character

76. : What is the geometry for ABE type structure?
(A) Distorted tetrahedral
(B) Regular tetrahedral
(C) Trigonal bipyramidal
(D) Octahedral

77. : What is the bond angle in octahedral geometry?
(A) 120°
(B) 180°
(C) 90° and 180°
(D) 90°

78. : Which of the mentioned is planar?
(A) CH3Cl
(B) C₂H₂
(C) CCl4
(D) CHCl3

79. : Of the molecules, SF₄, XeF₄, and CF₄, which has square planar geometry?
(A) SF₄, XeF₄ and CF₄
(B) XeF₄
(C) CF₄ only
(D) SF₄ only

80. : Which one of the following is paramagnetic and has the bond order equal to 0.6?
(A) N₂
(B) H₂
(C) F₂
(D) O₂

81. : What is the bond order in O₂?
(A) 1.0
(B) 2.5
(C) 2.0
(D) 1.5

82. : Which of the mentioned species is most stable?
(A) He₂
(B) H₂
(C) He₂⁺
(D) H₂⁺

83. : Which of the mentioned have identical bond order?
(A) CN⁻ and O⁻
(B) NO⁺ and CN⁺
(C) O₂⁻ and CN⁻
(D) CN⁻ and NO⁺

84. : Which of the mentioned molecules is paramagnetic in nature?
(A) F₂
(B) O₂
(C) H₂
(D) N₂

85. : What is the geometry of H₂S, H₂O, and O₃ and their dipole moment?
(A) Linear and zero
(B) Angular and non-zero
(C) Angular and zero
(D) Linear and non-zero

86. : Which of the mentioned species is diamagnetic in nature?
(A) O₂⁺
(B) O₂
(C) NO
(D) NO⁺

87. : Which one of the following has a linear structure?
(A) H₂O
(B) SO₂
(C) NO₂
(D) CO₂

88. : Which of the mentioned bonds between carbon-carbon is the strongest?
(A) Triple bond
(B) Pi-bond
(C) Double bond
(D) Sigma bond

89. : The hydrogen bond is strongest in
(A) O
(B) S-H……O
(C) F-H……O
(D) F-H…..F

90. : What is the hybridisation of sulphur in sulphur dioxide?
(A) sp²
(B) sp³
(C) sp
(D) dsp²

91. : On hybridization of one s and one p orbital we get
(A) Two mutually perpendicular orbitals
(B) Four orbitals directed tetrahedrally
(C) Two orbitals at 180°
(D) Three orbitals in a plane

92. : The bond angle around O atom in ice is close to
(A) 105°
(B) 120°
(C) 90°
(D) 60°

93. : The ion that is isoelectronic with CO is
(A) CO₂⁻
(B) O₂⁺
(C) CN⁻
(D) N₂⁺

94. : What is the bond order of NO molecule?
(A) 2.5
(B) 1
(C) 1.5
(D) 4

95. : The common features among the species CO, CN and NO are
(A) Bond order three and weak field ligands
(B) Bond order three and strong field ligands
(C) Bond order two and Pi acceptor
(D) Isoelectronic and weak field ligands

96. : Which one of the following is non-polar?
(A) CH₂Cl₂
(B) CHCl₃
(C) CCl₄
(D) CH₃Cl

97. : What are the interactions (intermolecular forces) in HF?
(A) Dipole-dipole interactions
(B) Hydrogen bonds
(C) Dipole-dipole and dispersion forces
(D) Hydrogen bond and dispersion forces

98. : Strongest intermolecular hydrogen bond is formed in which of the following?
(A) H₂O
(B) NH₃
(C) H₂S
(D) HF

99. : The attraction which exists between carbon dioxide molecules in solid carbon dioxide (dry ice) is due to
(A) Molecule-ion forces
(B) van der Waal’s forces
(C) Ionic bonds
(D) Hydrogen bonds

100. : Solid sodium chloride does not conduct electricity because
(A) In solid NaCl, there is no mobility of ions
(B) Solid NaCl is covalent in nature
(C) In solid NaCl, no ions are present
(D) In solid NaCl, there are no electrons

101. : Which of the mentioned contains both covalent and ionic bond?
(A) CCl₄
(B) H₂O
(C) CaCl₂
(D) NH₄Cl

102. : The shape of SO₄²⁻ ion is
(A) Trigonal planar
(B) Square planar
(C) Tetrahedral
(D) Octahedral

103. : Electron gas theory fails to explain
(A) Specific heat of metals
(B) Electrical and thermal conductivity
(C) Paramagnetic behavior of metals
(D) All A, B, and C

104. : Which one of the following is the true order of interactions?
(A) Covalent < hydrogen bonding < van der Waal’s < dipole-dipole
(B) van der Waal’s < hydrogen bonding < dipole-dipole < covalent
(C) van der Waal’s < < hydrogen bonding < covalent
(D) Dipole-dipole < van der Waal’s < hydrogen bonding < covalent

105. : The forces present in the crystal of naphthalene is
(A) van der Waals force
(B) Electrostatic force
(C) Covalent force
(D) Dipole-dipole force

106. : VSEPR theory said that the shape of the SO3 molecule is _____ .
(A) Pyramidal
(B) Tetrahedral
(C) Distorted tetrahedron
(D) Trigonal planar

107. : The strength of binding between atoms is measured in terms of cohesive energy. Which of the mentioned is not true about cohesive energy?
(A) It increases in a group from top to bottom
(B) It increases in a period
(C) It is maximum when electrons are unpaired
(D) It decreases in a group from top to bottom

108. : Which of the mentioned properties is explained by electron gas model?
(A) Thermal and electrical conductivity
(B) Ductility and malleability
(C) Metallic luster
(D) All A, B, and C

109. : Which of the mentioned is a characteristic of van der Waals forces?
(A) Bond energy —5kJ/mol
(B) Weak force
(C) Short range force
(D) All A, B, and C

110. : Which of the mentioned process involves the breaking of covalent bonds?
(A) Formation of atomic chlorine
(B) Melting of ice
(C) Evaporation of water
(D) Sublimation of iodine

111. : Which of the mentioned compounds has central atom as sp² hybridized?
(A) CO2
(B) SO3
(C) CO
(D) N2O

112. : Which of the mentioned molecule is not linear?
(A) CO₂
(B) HCN
(C) CO
(D) SO₂

113. : Which of the mentioned molecule has bond angle of 120°?
(A) CO₂
(B) NH3
(C) BF3
(D) CH4

114. : Which of the mentioned is effect of van der Waals forces?
(A) Gases like He, Ne can be liquefied
(B) Iodine and naphthalene are solids due to these forces
(C) Ionic crystals also have van der Waals forces
(D) All A, B, and C

115. : The shape of SnCl2 molecule is
(A) Angular
(B) Linear
(C) Trigonal planar
(D) Tetrahedral

116. : Which of the mentioned solids does not contain covalent bond?
(A) Graphite
(B) Ice
(C) Diamond
(D) Copper

117. : Which of the mentioned molecules has unpaired electrons in molecular orbits?
(A) B2
(B) F2
(C) O2
(D) N2

118. : Carbon atom in acetylene is hybridized?
(A) sp
(B) sp2
(C) sp3
(D) dsp2

119. : The number of unpaired electrons in PH3 is
(A) 2
(B) 1
(C) 0
(D) 3

120. : Which of the mentioned molecules is sp hybridized?
(A) BeCl2
(B) C2H4
(C) BF3
(D) None of A, B, and C

121. : What is the bond order of C2 molecule?
(A) 2.5
(B) 1
(C) 2
(D) 3

122. : What is the bond order of N2+ molecule?
(A) 1.5
(B) 2
(C) 2.5
(D) 3

123. : The bond order of O2 molecule is
(A) 2.5
(B) 2
(C) 1.5
(D) 3

124. : What is the bond order of NO+ ion?
(A) 4.5
(B) 2
(C) 2.5
(D) 3

125. : What is the bond order of N2 molecule?
(A) 2.5
(B) 2
(C) 1.5
(D) 3

126. : Which of the mentioned species is paramagnetic?
(A) C2
(B) N2
(C) B2
(D) F2

127. : Which of the mentioned species is diamagnetic?
(A) N2+
(B) C2
(C) N2
(D) B2