Set of Important MCQs on Chemical Bonding for the preparation of tests for chemistry and biology. 

Which of the mentioned pairs are not isostructural?

1. BF₃ and NO₃
2. BF₃ and NF₃
3. HO₃ and NH₃
4. NH3 and NF₃

Question’s Answer: BF₃ and NF₃

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BF, has zero dipole moment and NH₃ has a net dipole moment. What we want to say?

1. NH₃ is not a planar molecule; while BF₃ is a planar molecule
2. NH₃ is a planar molecule; while BF₃ is a planar molecule
3. Fluorine is more electronegative than nitrogen
4. Boron is more electronegative than nitrogen

Question’s Answer: NH₃ is not a planar molecule; while BF₃ is a planar molecule

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Which of the mentioned will exhibit variabl electro-valency due to inert pair effect?

1. Fe
2. K
3. Sn
4. Ca

Question’s Answer: Sn

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Which of the mentioned facts is not true about ionic substances?

1. Solids and crystalline
2. Have high m.p. and b.p
3. Conduct electricity
4. Exist as discrete molecules

Question’s Answer: Exist as discrete molecules

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Which of the mentioned facts is not true about covalent substances?

1. Soluble in polar solvents
2. Have low m.p. and b.p
3. Soluble in non-polar solvents
4. Exist as discrete molecules

Question’s Answer: Soluble in polar solvents

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Which of the mentioned halide has lowest melting spoint?

1. NaCl
2. NaF
3. Nal
4. NaBr

Question’s Answer: Nal

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lonic reactions primarily take place in which of the following?

1. Gaseous state
2. Non-aqueous solvents of low polarity.
3. Aqueous solutions and organic solvents of high polarity
4. Solid state

Question’s Answer: Aqueous solutions and organic solvents of high polarity

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Which of the mentioned properties is not involved in the calculation of lattice energy of an ionic compound?

1. Electronegativity
2. Dissociation energy
3. Ionization energy
4. Electron affinity

Question’s Answer: Electronegativity

Born-Haber cycle is helpful and used to calculate which property of the ionic substances?

1. Lattice energy
2. Electronegativity
3. % ionic character
4. Ionic radius

Question’s Answer: Lattice energy

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Which of the mentioned parameter is not true with respect to Fajan’s Rules?

1. Small cations favour covalence
2. Large cations favour covalence
3. Large anions favour covalence
4. High charge on cations/anions favour covalence

Question’s Answer: Large cations favour covalence

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Which halide of cesium will be highly ionic in nature?

1. Fluoride
2. Bromide
3. Chloride
4. Iodide

Question’s Answer: Fluoride

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Which of the mentioned silver halides is soluble in water due to polarization effect

1. Ag
2. AgBr
3. AgCl
4. AgF

Question’s Answer: AgF

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Which of the statement is true with respect to chemical bonding?

1. If electronegativity difference is >1.8. the bond is less ionic
2. If electronegativity difference is <1.8. the bond is more ionic
3. If electronegativity difference is 1.8, bond is 50% ionic and 50% covalent
4. If electronegativity difference is >1.8. the bond is more ionic

Question’s Answer: If electronegativity difference is >1.8. the bond is more ionic

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Which of the mentioned molecules is not angular in structure?

1. HO
2. SO
3. CO
4. O

Question’s Answer: CO

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The forces responsible for dissolution of ionic compounds in water are

1. lon-dipole forces
2. Covalent bonds
3. Metallic bond
4. Van der Waal forces.

Question’s Answer: lon-dipole forces

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Which of the mentioned molecules has trigonal planar geometry?

1. NF₃
2. BF₃
3. O₃
4. NH₃

Question’s Answer: BF₃

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How Pi bond is formed?

1. By the overlapping of atomic orbitals on internuclear axis
2. By sidewise overlapping to half-filled p-orbitals
3. By transference of electrons
4. By overlapping of s-orbitals with p- orbitals.

Question’s Answer: By sidewise overlapping to half-filled p-orbitals

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Which of the mentioned molecules has trigonal bipyramidal geometry?

1. CHCL
2. CCl
3. XeF
4. SF

Question’s Answer: SF

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Ionic compounds in general possess both

1. High melting points and low-boiling points
2. High melting point and non-directional bonds
3. Directional bonds and low-boiling points
4. High solubility in polar and non-polar solvents

Question’s Answer: High melting point and non-directional bonds

Which of the mentioned molecules has square pyramidal geometry?

1. SF
2. BrF
3. CCl
4. PCs

Question’s Answer: BrF

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Which of the mentioned is not a characteristic of covalent compounds?

1. points They ionize on dissolution in polar solvents
2. They have low melting and boiling
3. Their molecules have definite geometry
4. They are generally insoluble in water is

Question’s Answer: They ionize on dissolution in polar solvents

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Which of the mentioned statements is true?

1. A sigma bond is weaker than a pi bond
2. There are four coordinate bonds in the Lewis structure of NH on.
3. A single bond between the two atoms cannot be r bond.
4. The covalent bond is directional in nature

Question’s Answer: A single bond between the two atoms cannot be r bond

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In which of the mentioned species the bonds are non-directional?

1. NCl₃
2. BCl₃
3. BeCl₂
4. RbCl

Question’s Answer: RbCl

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The geometry of the molecule is primarily decided by

1. Bond pairs around the central atom
2. No. of bond pairs as well as lone pairs around the central atom
3. No. of Pi bonds around the central atom
4. No. of lone pairs on central atom

Question’s Answer: No. of bond pairs as well as lone pairs around the central atom

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In the formation of H2O molecule, the oxygen atom makes use of

1. sp-hybrid orbitals
2. sp-hybrid orbitals
3. 2p-orbitals
4. sp-hybrid orbitals

Question’s Answer: sp-hybrid orbitals

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Which of the mentioned statement is false?

1. CCl gives a white ppt. with AgNO₃ solution
2. Beryllium chloride is covalent
3. Sodium hydride is ionic
4. Bonds in NaCl are non-directional

Question’s Answer: CCl gives a white ppt. with AgNO₃ solution

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Which of the mentioned molecule does not contain the covalent bond between similar atoms?

1. H₂F₂
2. FO₂
3. N₂H
4. H₂O₂.

Question’s Answer: H₂F₂

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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?

1. lonic bond
2. Metallic bond
3. Coordinate covalent bond
4. Covalent bond

Question’s Answer: Covalent bond

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A molecule MX₁ has a square planar shape. What is the number of non-bonding pairs of electrons around M?

1. 5
2. 4
3. 2
4. 0

Question’s Answer: 2

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Which of the mentioned gaseous molecule is non-linear?

1. XeF₂
2. HCN
3. BeF₂
4. H₂O

Question’s Answer: H₂O

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What is the geometry of IF₇?

1. Heptagonal
2. Trigonal bipyramidal
3. Icosehederal
4. Pentagonal bipyramidal

Question’s Answer: Pentagonal bipyramidal

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Which of the mentioned species has a linear shape?

1. H₂O
2. SO₂
3. CIO₂
4. I₃

Question’s Answer: I₃

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Which is the bond that is formed by complete transfer of electrons from electropositive to more electronegative atom?

1. Co-ordinate bond
2. Covalent bond
3. Ionic bond
4. Metallic bond

Question’s Answer: Ionic bond

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The bond length is measured by

1. Microwave spectroscopy
2. Neutron diffraction
3. X-ray diffraction
4. All A, B, and C

Question’s Answer: All A, B, and C

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The bond order of B2 molecule is

1. 2
2. 1
3. 2.5
4. 3

Question’s Answer: 1

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The polarity of bonds can lead to polarity of molecules and affect

1. Solubility
2. Boiling point
3. Melting point
4. All A, B, and C

Question’s Answer: All A, B, and C

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Which molecule has zero dipole moment?

1. BCl₃
2. CO₂
3. CICH₃
4. H₂O

Question’s Answer: CO₂

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Which of the mentioned species has Aetrahedral structure?

1. SF₄
2. CCI₄
3. XeF₄
4. NO₃

Question’s Answer: CCI₄

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Which of the mentioned compound does not following octet rule?

1. BrF₃
2. PBr₃
3. IBr
4. CS₂

Question’s Answer: BrF₃

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Which of the mentioned is not a strong interaction?

1. Ionic bond
2. Coordinate covalent bond
3. Covalent bond
4. van der Waals forces

Question’s Answer: van der Waals forces

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What is the bond angel of sp² hybridization?

1. 180°
2. 109.5°
3. 120°
4. 160°

Question’s Answer: 120°

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PCl5 is an example of hybridization

1. sp³
2. d²ep³
3. sp²
4. d sp³

Question’s Answer: d sp³

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In which fashion d²sp³ is oriented?

1. Octahedral
2. Tetrahedral
3. Trigonal
4. Trigonal bipyramidal

Question’s Answer: Octahedral

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The bond order gives the ______ valuable information

1. Magnetic properties
2. Bond dissociation energy and bond length
3. Stability of the molecules or ions
4. All A, B, and C

Question’s Answer: All A, B, and C

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What is the bond distance of Og molecule?

1. 1.23 Å
2. 1.21 A
3. 2.09 Å
4. None of A, B, and C

Question’s Answer: 1.21 A

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What is the bond order for BO molecule?

3. 3.5
4. 4.0
5. 6.2
6. 2.5

Question’s Answer: 2.5

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Which is an example of Intra-molecular hydrogen bonding?

1. O-hydroxy benzoic acid
2. O-hydroxy benzaldehyde
3. O-nitrophenol
4. All A, B, and C

Question’s Answer: O-hydroxy benzoic acid

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Which of the mentioned statements is false with respect to hybridization?

1. Hybrid orbitals are non-directional
2. Atomic orbitals have comparable size
3. Hybrid orbitals are directional
4. Atomic orbitals have comparable energy

Question’s Answer: Hybrid orbitals are non-directional

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In order to understand the nature of H-bond, which theory has been suggested?

1. Valence bond approach
2. Molecular orbital approach
3. Electrostatic approach
4. All A, B, and C

Question’s Answer: All A, B, and C

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Which hybridization octahedral geometry?

1. sp³d
2. sp³
3. d²sp³
4. sp³d³

Question’s Answer: d²sp³

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Ethylene molecule involves hybridization

1. dsp³
2. sp³
3. dsp²
4. sp²

Question’s Answer: sp²

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H-bond has a preferred bonding direction like

1. Covalent bond
2. Ionic bond
3. Coordinate bond
4. None of A, B, and C

Question’s Answer: Covalent bond

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H-bonding also exist in living system like

1. Protein
2. Enzymes
3. DNA
4. All A, B, and C

Question’s Answer: All A, B, and C

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Metals are generally ____  elements.

1. Electronegative
2. Electropositive
3. Neutral
4. None of A, B, and C

Question’s Answer: Electropositive

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Metals are

1. Opaque
2. Translucent
3. Transparent
4. None of A, B, and C

Question’s Answer: Opaque

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Electron gas theory is able to explain which of the following?

1. Metallic lusture and optical properties
2. High electrical and thermal conductivity.
3. Malleability and ductility
4. All A, B, and C

Question’s Answer: All A, B, and C

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Metallic bond is treated essentially as in character

1. Ionic
2. Polar
3. Covalent
4. Non polar

Question’s Answer: Covalent

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Which of the mentioned molecules has linear geometry?

1. XeF₂
2. BeCl₂
3. BeF₂
4. All A, B, and C

Question’s Answer: All A, B, and C

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SF has which geometry?

1. Planar structure
2. Square bipyramidal
3. Tetrahedral structure
4. Octahedral structure

Question’s Answer: Octahedral structure

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Which of the mentioned properties is associated with the covalent nature of the compound?

1. It conducts electricity in molten state or aqueous state
2. It has high m.p.
3. It is a non-electrolyte
4. It is a compound of a metal and non-metal

Question’s Answer: It is a non-electrolyte

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Which of the following has a co-ordinate bond?

1. BF₃
2. Al₂Cl₆
3. NaCl
4. O₂

Question’s Answer: Al₂Cl₆

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Which of the mentioned is not true about resonance?

1. Structures should have comparable energy
2. The position of nuclei should be fixed in all structures
3. Number of lone pairs should be equal
4. The species should be non-planar

Question’s Answer: The species should be non-planar

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Which of the mentioned has zero dipole moment?

1. NH₃
2. Cl₂
3. CHCL₃
4. NF₃

Question’s Answer: CHCL₃

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Which energy is the difference in energy between the resonance hybrid and the most stable structure?

1. Binding energy
2. Resonance energy
3. Activation energy
4. Lattice energy

Question’s Answer: Resonance energy

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What is the state of hybridization of carbon in CO₂?

1. sp
2. sp³
3. sp²
4. dsp²

Question’s Answer: sp

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The percentage of s-character in the hybrid 3 orbitals sp, sp and sp follows which of the following pattern?

1. sp³>sp²>sp
2. sp = sp²>sp³
3. sp>sp²>sp³
4. sp = sp2 = sp³

Question’s Answer: sp>sp²>sp³

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Valence bond theory is also called as

1. Electron pool theory
2. Band theory
3. Electron gas theory
4. Electron pair theory

Question’s Answer: Electron pair theory

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A covalent bond which is formed between two atoms by the overlap of atomic orbitals along their axis is called

1. Pi-bond.
2. Polar bond
3. Sigma bond
4. Non polar bond

Question’s Answer: Sigma bond

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BCl₃ is an example of hybridization

1. sp
2. sp³
3. sp²
4. d²sp³

Question’s Answer: sp²

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Which of the mentioned bonds has shorter bond length?

1. Carbon-carbon triple bond
2. Carbon-carbon double bond
3. Carbon-chlorine bond
4. Carbon-carbon single bond

Question’s Answer: Carbon-carbon triple bond

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Which of the mentioned bonds will be non-polar?

1. N-H
2. O-H
3. CI-CI
4. C-H

Question’s Answer: CI-CI

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The pair of molecules or ions is ______, ________  having identical geometry.

1. SiCL₄, CCl₄
2. BF₃, NH₃
3. CH₂Cl₂, CCl₄
4. BC₃, PCI₃

Question’s Answer: SiCL₄, CCl₄

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Which of the mentioned statement is not true about VSEPR model?

1. Total electron pairs around central atom remain at maximum distance
2. Lone pair occupies more space than bond pair
3. Lone pair occupies less than bond pair
4. Double bond occupies more space than bond

Question’s Answer: Lone pair occupies less than bond pair

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Which of the mentioned molecules has bond angle minimum?

1. CO₂
2. H₂O
3. NH₃
4. CH₄

Question’s Answer: H₂O

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An sp³ hybrid orbital contains which of the following character?

1. 2/3 s character
2. 1/2 s character
3. 1/1s character
4. 3/4 s character

Question’s Answer: 1/1s character

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What is the geometry for ABE type structure?

1. Distorted tetrahedral
2. Regular tetradydral
3. Trigonal bipyramidal
4. Octahedral

Question’s Answer: Distorted tetrahedral

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What is the bond angel in octahedral geometry?

1. 120°
2. 180°

C 90° and 180°

1. 90°

Question’s Answer: 90°

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Which of the mentioned is planar?

1. CH3CI
2. C₂H₂
3. CCI₄
4. CHCI₃

Question’s Answer: C₂H₂

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Of the molecules, SF, XeF, and CF), which has square planar geometry”

1. SF₄, XeF₄ and CF₄
2. XeF₄
3. CF₄ only
4. SF₄ only

Question’s Answer: XeF₄

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Which one of following is paramagnetic and has the bond order equal to 0.6?

1. N₂
2. H₂
3. F₂
4. O₂

Question’s Answer: H₂

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What is the order in O₂?

1. 1.0
2. 2.5
3. 2.0
4. 1.5

Question’s Answer: 2.5

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Which of the mentioned species is most stable?

1. He₂
2. H₂
3. He₂⁺
4. H₂+

Question’s Answer: H₂

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Which of the mentioned have identical bond order?

1. CN^– and O_­­^–
2. NO⁺ and CN⁺
3. O₂^– and CN^–
4. CN^– and NO⁺

Question’s Answer: CN^– and NO⁺

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Which of the mentioned molecule is paramagnet in nature?

1. F₂
2. O₂
3. H₂
4. N₂

Question’s Answer: O₂

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What is the geometry of H₂S/H₂O/O₃ and its dipole moment?

1. Linear and zero
2. Angular and non-zero
3. Angular and zero
4. Linear and non-zero

Question’s Answer: Angular and non-zero

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Which of the mentioned species is diamagnetic in nature?

1. O₂⁺
2. O₂
3. NO
4. NO⁺

Question’s Answer: NO⁺

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Which one of the following has a linear structure?

1. H₂O
2. SO₂
3. NO₂
4. CO₂

Question’s Answer: CO₂

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Which of the mentioned bonds between carbon-carbon is the strongest?

1. Triple bond
2. Pi-bond
3. Double bond
4. Sigma bond

Question’s Answer: Triple bond

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The hydrogen bond is strongest in

1. O
2. S-H……O
3. F-H……O
4. FH…..F

Question’s Answer: FH…..F

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What is the hybridisation of sulphur in sulphur dioxide?

1. sp²
2. sp³
3. sp
4. dsp²

Question’s Answer: sp²

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On hydridization of one s and one p orbitals we get

1. Two mutually perpendicular orbitals
2. Four orbitals directed tetrahedrally
3. Two orbitals at 180°
4. Three orbitals in a plane

Question’s Answer: Two orbitals at 180°

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The bond angel around O atom in ice is close to

1. 105°
2. 120°
3. 90°
4. 60°

Question’s Answer: 105°

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The ion that is isoelectronic with CO is __ .

1. CO₂^–
2. O₂⁺
3. CN^–
4. N₂⁺

Question’s Answer: CN^–

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What is the bond order of NO molecule?

1. 2.5
2. 1
3. 1.5
4. 4

Question’s Answer: 2.5

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The common features among the species CO. CN and NO are

1. Bond order three and weak field ligands
2. Bond order three and strong field ligands
3. Bond order two and Pi acceptor
4. Isoelectronic and weak field ligands

Question’s Answer: Bond order three and strong field ligands

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Which one of following is non-polar?

1. CH₂Cl₂
2. CHCl₃
3. CCL₄
4. CH₃CI

Question’s Answer: CCL₄

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What are the interactions (intermolecular forces) in HF?

1. Dipole-dipole interactions
2. Hydrogen bonds
3. Dipole-dipole and dispersion forces
4. Hydrogen bond and dispersion forces

Question’s Answer: Hydrogen bond and dispersion forces

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Strongest intermolecular hydrogen bond is formed in which of the following?

A H₂O

1. NH₃
2. H₂S
3. HF

Question’s Answer: HF

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The attraction which exists between carbon dioxide molecules in solid carbon dioxide (or dry ice) is due to

1. Molecule-ion forces
2. van der Waal’s forces
3. Ionic bonds
4. Hydrogen bonds

Question’s Answer: van der Waal’s forces

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Solid sodium chloride does not conduct electricity because

1. In solid NaCl, there is no mobility of ions
2. Solid NaCl is covalent in nature
3. In solid NaCl, no ions are present
4. In solid NaCl, there are no electrons.

Question’s Answer: In solid NaCl, there is no mobility of ions

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Which of the mentioned contains both covalent and ionic bond?

1. CCl₄
2. H₂O
3. CaCl₂
4. NH₄CI

Question’s Answer: NH₄CI

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The shape of SO₄^2- ion is

1. Trigonal planar
2. Square planar
3. Tetrahedral
4. Octahedral

Question’s Answer: Tetrahedral

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Electron gas theory fails to explain

1. Specific heat of metals
2. Electrical and thermal conductivity
3. Paramagnetic behavior of metals
4. All A, B, and C

Question’s Answer: All A, B, and C

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Which one of the following is the true order of interactions?

1. Covalent < hydrogen bonding < van der Waal’s < dipole-dipole
2. van der Waal’s < hydrogen bonding < dipole-dipole < covalent
3. van der Waal’s < < hydrogen bonding < covalent
4. Dipole-dipole < van der Waal’s < hydrogen bonding < covalent

Question’s Answer: van der Waal’s < < hydrogen bonding < covalent

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The forces present in the crystal of naphthalene is

1. van der Waals force
2. Electrostatic force
3. Covalent force
4. Dipole-dipole force

Question’s Answer: van der Waals force

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VSEPR theory said that the shape of the SO₃ molecule is _____ .

1. Pyramidal
2. Tetrahedral
3. Distorted tetrahedron.
4. Trigonal planar

Question’s Answer: Trigonal planar

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The strength of binding between atoms is measured in terms of cohesive energy. Which of the mentioned is not true about cohesive energy?

1. It increases in a group from top to bottom
2. It increases in a period
3. It is maximum when electrons are unpaired
4. It decreases in a group from top to bottom

Question’s Answer: It increases in a group from top to bottom

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Which of the mentioned properties is explained by electron gas model?

1. Thermal and electrical conductivity
2. Ductility and malleability
3. Metallic luster
4. All A, B, and C

Question’s Answer: All A, B, and C

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Which of the mentioned is a characteristic of van der Waals forces?

1. Bond energy —5kJ/mol
2. Weak force
3. Short range force
4. All A, B, and C

Question’s Answer: All A, B, and C

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Which of the mentioned process involves the breaking of covalent bonds?

1. Formation of atomic chlorine

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1. Melting of ice
2. Evaporation of water
3. Sublimation of iodine

Question’s Answer: Formation of atomic chlorine

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Which of the mentioned compounds has central atom as sp² hybridized?

1. CO₂
2. SO₃
3. CO
4. N₂O

Question’s Answer: SO₃

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Which of the mentioned molecule is not linear?

1. CO₂
2. HCN
3. CO
4. SO₂

Question’s Answer: SO₂

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Which of the mentioned molecule has bond angle of 120°?

1. CO₂
2. NH₃
3. BF₃
4. CH₄

Question’s Answer: BF₃

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Which of the mentioned is effect of van der 12 Waals forces?

1. Gases like He, Ne can be liquefied
2. Iodine and naphthalene are solids due to these forces
3. Ionic crystals also have van der Waals forces
4. All A, B, and C

Question’s Answer: All A, B, and C

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The shape of SnCl2 molecule is

1. Angular
2. Linear
3. Trigonal planar
4. Tetradedral

Question’s Answer: Angular

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Which of the mentioned solids does not contain covalent bond?

1. Graphite
2. Ice
3. Diamond
4. Copper

Question’s Answer: Copper

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Which of the mentioned molecules has unpaired electrons in molecular orbits?

1. B₂
2. F₂
3. O₂
4. N₂

Question’s Answer: O₂

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Carbon atom in acetylene is hybridized?

1. sp
2. sp²
3. sp³
4. dsp²

Question’s Answer: sp

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The number of unpaired electrons in PH₃ is

1. 2
2. 1
3. 0
4. 3

Question’s Answer: 1

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Which of the mentioned molecules is sp hybridized?

1. BeCl₂
2. C₂H₄
3. BF₃
4. None of A, B, and C

Question’s Answer: BeCl₂

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What is the bond order of C₂ molecule?

1. 2.5
2. 1
3. 2
4. 3

Question’s Answer: 2

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What is the bond order of N₂⁺ molecule?

1. 1.5
2. 2
3. 2.5
4. 3

Question’s Answer: 2.5

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The bond order of O₂ molecule is

1. 2.5
2. 2
3. 1.5
4. 3

Question’s Answer: 1.5

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What is the bond order of NO⁺ ion?

1. 4.5
2. 2
3. 2.5
4. 3

Question’s Answer: 3

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What is the bond order of N₂ molecule?

1. 2.5
2. 2
3. 1.5
4. 3

Question’s Answer: 2.5

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Which of the mentioned species is paramagnetic?

1. C₂
2. N₂
3. B₂
4. F₂

Question’s Answer: B₂

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Which of the mentioned species is diamagnetic?

1. N₂⁺
2. C₂
3. N₂
4. B₂

Question’s Answer: C₂

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