Set of Important MCQs on Chemical Bonding for the preparation of tests for chemistry and biology.Â
Which of the mentioned pairs are not isostructural?
- BF3 and NO3
- BF3 and NF3
- HO3 and NH3
- NH3 and NF3
Question’s Answer: BF3 and NF3
BF, has zero dipole moment and NH3 has a net dipole moment. What we want to say?
- NH3 is not a planar molecule; while BF3 is a planar molecule
- NH3 is a planar molecule; while BF3 is a planar molecule
- Fluorine is more electronegative than nitrogen
- Boron is more electronegative than nitrogen
Question’s Answer: NH3 is not a planar molecule; while BF3 is a planar molecule
Which of the mentioned will exhibit variabl electro-valency due to inert pair effect?
- Fe
- K
- Sn
- Ca
Question’s Answer: Sn
Which of the mentioned facts is not true about ionic substances?
- Solids and crystalline
- Have high m.p. and b.p
- Conduct electricity
- Exist as discrete molecules
Question’s Answer: Exist as discrete molecules
Which of the mentioned facts is not true about covalent substances?
- Soluble in polar solvents
- Have low m.p. and b.p
- Soluble in non-polar solvents
- Exist as discrete molecules
Question’s Answer: Soluble in polar solvents
Which of the mentioned halide has lowest melting spoint?
- NaCl
- NaF
- Nal
- NaBr
Question’s Answer: Nal
lonic reactions primarily take place in which of the following?
- Gaseous state
- Non-aqueous solvents of low polarity.
- Aqueous solutions and organic solvents of high polarity
- Solid state
Question’s Answer: Aqueous solutions and organic solvents of high polarity
Which of the mentioned properties is not involved in the calculation of lattice energy of an ionic compound?
- Electronegativity
- Dissociation energy
- Ionization energy
- Electron affinity
Question’s Answer: Electronegativity
Born-Haber cycle is helpful and used to calculate which property of the ionic substances?
- Lattice energy
- Electronegativity
- % ionic character
- Ionic radius
Question’s Answer: Lattice energy
Which of the mentioned parameter is not true with respect to Fajan’s Rules?
- Small cations favour covalence
- Large cations favour covalence
- Large anions favour covalence
- High charge on cations/anions favour covalence
Question’s Answer: Large cations favour covalence
Which halide of cesium will be highly ionic in nature?
- Fluoride
- Bromide
- Chloride
- Iodide
Question’s Answer: Fluoride
Which of the mentioned silver halides is soluble in water due to polarization effect
- Ag
- AgBr
- AgCl
- AgF
Question’s Answer: AgF
Which of the statement is true with respect to chemical bonding?
- If electronegativity difference is >1.8. the bond is less ionic
- If electronegativity difference is <1.8. the bond is more ionic
- If electronegativity difference is 1.8, bond is 50% ionic and 50% covalent
- 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
Which of the mentioned molecules is not angular in structure?
- HO
- SO
- CO
- O
Question’s Answer: CO
The forces responsible for dissolution of ionic compounds in water are
- lon-dipole forces
- Covalent bonds
- Metallic bond
- Van der Waal forces.
Question’s Answer: lon-dipole forces
Which of the mentioned molecules has trigonal planar geometry?
- NF3
- BF3
- O3
- NH3
Question’s Answer: BF3
How Pi bond is formed?
- By the overlapping of atomic orbitals on internuclear axis
- By sidewise overlapping to half-filled p-orbitals
- By transference of electrons
- By overlapping of s-orbitals with p- orbitals.
Question’s Answer: By sidewise overlapping to half-filled p-orbitals
Which of the mentioned molecules has trigonal bipyramidal geometry?
- CHCL
- CCl
- XeF
- SF
Question’s Answer: SF
Ionic compounds in general possess both
- High melting points and low-boiling points
- High melting point and non-directional bonds
- Directional bonds and low-boiling points
- 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?
- SF
- BrF
- CCl
- PCs
Question’s Answer: BrF
Which of the mentioned is not a characteristic of covalent compounds?
- points They ionize on dissolution in polar solvents
- They have low melting and boiling
- Their molecules have definite geometry
- They are generally insoluble in water is
Question’s Answer: They ionize on dissolution in polar solvents
Which of the mentioned statements is true?
- A sigma bond is weaker than a pi bond
- There are four coordinate bonds in the Lewis structure of NH on.
- A single bond between the two atoms cannot be r bond.
- The covalent bond is directional in nature
Question’s Answer: A single bond between the two atoms cannot be r bond
In which of the mentioned species the bonds are non-directional?
- NCl3
- BCl3
- BeCl2
- RbCl
Question’s Answer: RbCl
The geometry of the molecule is primarily decided by
- Bond pairs around the central atom
- No. of bond pairs as well as lone pairs around the central atom
- No. of Pi bonds around the central atom
- No. of lone pairs on central atom
Question’s Answer: No. of bond pairs as well as lone pairs around the central atom
In the formation of H2O molecule, the oxygen atom makes use of
- sp-hybrid orbitals
- sp-hybrid orbitals
- 2p-orbitals
- sp-hybrid orbitals
Question’s Answer: sp-hybrid orbitals
Which of the mentioned statement is false?
- CCl gives a white ppt. with AgNO3 solution
- Beryllium chloride is covalent
- Sodium hydride is ionic
- Bonds in NaCl are non-directional
Question’s Answer: CCl gives a white ppt. with AgNO3 solution
Which of the mentioned molecule does not contain the covalent bond between similar atoms?
- H2F2
- FO2
- Nâ‚‚H
- H2O2.
Question’s Answer: H2F2
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?
- lonic bond
- Metallic bond
- Coordinate covalent bond
- Covalent bond
Question’s Answer: Covalent bond
A molecule MX1 has a square planar shape. What is the number of non-bonding pairs of electrons around M?
- 5
- 4
- 2
- 0
Question’s Answer: 2
Which of the mentioned gaseous molecule is non-linear?
- XeF2
- HCN
- BeF2
- Hâ‚‚O
Question’s Answer: H₂O
What is the geometry of IF7?
- Heptagonal
- Trigonal bipyramidal
- Icosehederal
- Pentagonal bipyramidal
Question’s Answer: Pentagonal bipyramidal
Which of the mentioned species has a linear shape?
- Hâ‚‚O
- SO2
- CIO2
- I3
Question’s Answer: I3
Which is the bond that is formed by complete transfer of electrons from electropositive to more electronegative atom?
- Co-ordinate bond
- Covalent bond
- Ionic bond
- Metallic bond
Question’s Answer: Ionic bond
The bond length is measured by
- Microwave spectroscopy
- Neutron diffraction
- X-ray diffraction
- All A, B, and C
Question’s Answer: All A, B, and C
The bond order of B2 molecule is
- 2
- 1
- 2.5
- 3
Question’s Answer: 1
The polarity of bonds can lead to polarity of molecules and affect
- Solubility
- Boiling point
- Melting point
- All A, B, and C
Question’s Answer: All A, B, and C
Which molecule has zero dipole moment?
- BCl3
- COâ‚‚
- CICH3
- H2O
Question’s Answer: CO₂
Which of the mentioned species has Aetrahedral structure?
- SF4
- CCI4
- XeF4
- NO3
Question’s Answer: CCI4
Which of the mentioned compound does not following octet rule?
- BrF3
- PBr3
- IBr
- CS2
Question’s Answer: BrF3
Which of the mentioned is not a strong interaction?
- Ionic bond
- Coordinate covalent bond
- Covalent bond
- van der Waals forces
Question’s Answer: van der Waals forces
What is the bond angel of sp2 hybridization?
- 180°
- 109.5°
- 120°
- 160°
Question’s Answer: 120°
PCl5 is an example of hybridization
- sp3
- d2ep3
- sp2
- d sp³
Question’s Answer: d sp³
In which fashion d2sp3 is oriented?
- Octahedral
- Tetrahedral
- Trigonal
- Trigonal bipyramidal
Question’s Answer: Octahedral
The bond order gives the ______ valuable information
- Magnetic properties
- Bond dissociation energy and bond length
- Stability of the molecules or ions
- All A, B, and C
Question’s Answer: All A, B, and C
What is the bond distance of Og molecule?
- 1.23 Ã…
- 1.21 A
- 2.09 Ã…
- None of A, B, and C
Question’s Answer: 1.21 A
What is the bond order for BO molecule?
- 3.5
- 4.0
- 6.2
- 2.5
Question’s Answer: 2.5
Which is an example of Intra-molecular hydrogen bonding?
- O-hydroxy benzoic acid
- O-hydroxy benzaldehyde
- O-nitrophenol
- All A, B, and C
Question’s Answer: O-hydroxy benzoic acid
Which of the mentioned statements is false with respect to hybridization?
- Hybrid orbitals are non-directional
- Atomic orbitals have comparable size
- Hybrid orbitals are directional
- Atomic orbitals have comparable energy
Question’s Answer: Hybrid orbitals are non-directional
In order to understand the nature of H-bond, which theory has been suggested?
- Valence bond approach
- Molecular orbital approach
- Electrostatic approach
- All A, B, and C
Question’s Answer: All A, B, and C
Which hybridization octahedral geometry?
- sp³d
- sp³
- d2sp³
- sp³d³
Question’s Answer: d2sp³
Ethylene molecule involves hybridization
- dsp3
- sp3
- dsp2
- sp2
Question’s Answer: sp2
H-bond has a preferred bonding direction like
- Covalent bond
- Ionic bond
- Coordinate bond
- None of A, B, and C
Question’s Answer: Covalent bond
H-bonding also exist in living system like
- Protein
- Enzymes
- DNA
- All A, B, and C
Question’s Answer: All A, B, and C
Metals are generally ____ Â elements.
- Electronegative
- Electropositive
- Neutral
- None of A, B, and C
Question’s Answer: Electropositive
Metals are
- Opaque
- Translucent
- Transparent
- None of A, B, and C
Question’s Answer: Opaque
Electron gas theory is able to explain which of the following?
- Metallic lusture and optical properties
- High electrical and thermal conductivity.
- Malleability and ductility
- All A, B, and C
Question’s Answer: All A, B, and C
Metallic bond is treated essentially as in character
- Ionic
- Polar
- Covalent
- Non polar
Question’s Answer: Covalent
Which of the mentioned molecules has linear geometry?
- XeF2
- BeCl2
- BeF2
- All A, B, and C
Question’s Answer: All A, B, and C
SF has which geometry?
- Planar structure
- Square bipyramidal
- Tetrahedral structure
- Octahedral structure
Question’s Answer: Octahedral structure
Which of the mentioned properties is associated with the covalent nature of the compound?
- It conducts electricity in molten state or aqueous state
- It has high m.p.
- It is a non-electrolyte
- It is a compound of a metal and non-metal
Question’s Answer: It is a non-electrolyte
Which of the following has a co-ordinate bond?
- BF3
- Al2Cl6
- NaCl
- Oâ‚‚
Question’s Answer: Al2Cl6
Which of the mentioned is not true about resonance?
- Structures should have comparable energy
- The position of nuclei should be fixed in all structures
- Number of lone pairs should be equal
- The species should be non-planar
Question’s Answer: The species should be non-planar
Which of the mentioned has zero dipole moment?
- NH3
- Cl2
- CHCL3
- NF3
Question’s Answer: CHCL3
Which energy is the difference in energy between the resonance hybrid and the most stable structure?
- Binding energy
- Resonance energy
- Activation energy
- Lattice energy
Question’s Answer: Resonance energy
What is the state of hybridization of carbon in CO2?
- sp
- sp3
- sp2
- dsp2
Question’s Answer: sp
The percentage of s-character in the hybrid 3 orbitals sp, sp and sp follows which of the following pattern?
- sp³>sp²>sp
- sp = sp²>sp³
- sp>sp²>sp³
- sp = sp2 = sp³
Question’s Answer: sp>sp²>sp³
Valence bond theory is also called as
- Electron pool theory
- Band theory
- Electron gas theory
- Electron pair theory
Question’s Answer: Electron pair theory
A covalent bond which is formed between two atoms by the overlap of atomic orbitals along their axis is called
- Pi-bond.
- Polar bond
- Sigma bond
- Non polar bond
Question’s Answer: Sigma bond
BCl3 is an example of hybridization
- sp
- sp3
- sp2
- d2sp³
Question’s Answer: sp2
Which of the mentioned bonds has shorter bond length?
- Carbon-carbon triple bond
- Carbon-carbon double bond
- Carbon-chlorine bond
- Carbon-carbon single bond
Question’s Answer: Carbon-carbon triple bond
Which of the mentioned bonds will be non-polar?
- N-H
- O-H
- CI-CI
- C-H
Question’s Answer: CI-CI
The pair of molecules or ions is ______, ________Â having identical geometry.
- SiCL4, CCl4
- BF3, NH3
- CH2Cl2, CCl4
- BC3, PCI3
Question’s Answer: SiCL4, CCl4
Which of the mentioned statement is not true about VSEPR model?
- Total electron pairs around central atom remain at maximum distance
- Lone pair occupies more space than bond pair
- Lone pair occupies less than bond pair
- Double bond occupies more space than bond
Question’s Answer: Lone pair occupies less than bond pair
Which of the mentioned molecules has bond angle minimum?
- CO2
- Hâ‚‚O
- NH3
- CH4
Question’s Answer: H₂O
An sp³ hybrid orbital contains which of the following character?
- 2/3 s character
- 1/2 s character
- 1/1s character
- 3/4 s character
Question’s Answer: 1/1s character
What is the geometry for ABE type structure?
- Distorted tetrahedral
- Regular tetradydral
- Trigonal bipyramidal
- Octahedral
Question’s Answer: Distorted tetrahedral
What is the bond angel in octahedral geometry?
- 120°
- 180°
C 90° and 180°
- 90°
Question’s Answer: 90°
Which of the mentioned is planar?
- CH3CI
- Câ‚‚Hâ‚‚
- CCI4
- CHCI3
Question’s Answer: C₂H₂
Of the molecules, SF, XeF, and CF), which has square planar geometry”
- SF4, XeF4 and CF4
- XeF4
- CF4 only
- SF4 only
Question’s Answer: XeF4
Which one of following is paramagnetic and has the bond order equal to 0.6?
- N2
- H2
- F2
- O2
Question’s Answer: H2
What is the order in Oâ‚‚?
- 1.0
- 2.5
- 2.0
- 1.5
Question’s Answer: 2.5
Which of the mentioned species is most stable?
- Heâ‚‚
- Hâ‚‚
- Heâ‚‚+
- Hâ‚‚+
Question’s Answer: H₂
Which of the mentioned have identical bond order?
- CN– and O–
- NO+ and CN+
- Oâ‚‚– and CN–
- CN– and NO+
Question’s Answer: CN– and NO+
Which of the mentioned molecule is paramagnet in nature?
- Fâ‚‚
- Oâ‚‚
- Hâ‚‚
- Nâ‚‚
Question’s Answer: O₂
What is the geometry of H2S/H2O/O3 and its dipole moment?
- Linear and zero
- Angular and non-zero
- Angular and zero
- Linear and non-zero
Question’s Answer: Angular and non-zero
Which of the mentioned species is diamagnetic in nature?
- O2+
- O2
- NO
- NO+
Question’s Answer: NO+
Which one of the following has a linear structure?
- Hâ‚‚O
- SOâ‚‚
- NOâ‚‚
- COâ‚‚
Question’s Answer: CO₂
Which of the mentioned bonds between carbon-carbon is the strongest?
- Triple bond
- Pi-bond
- Double bond
- Sigma bond
Question’s Answer: Triple bond
The hydrogen bond is strongest in
- O
- S-H……O
- F-H……O
- FH…..F
Question’s Answer: FH…..F
What is the hybridisation of sulphur in sulphur dioxide?
- sp2
- sp3
- sp
- dsp2
Question’s Answer: sp2
On hydridization of one s and one p orbitals we get
- Two mutually perpendicular orbitals
- Four orbitals directed tetrahedrally
- Two orbitals at 180°
- Three orbitals in a plane
Question’s Answer: Two orbitals at 180°
The bond angel around O atom in ice is close to
- 105°
- 120°
- 90°
- 60°
Question’s Answer: 105°
The ion that is isoelectronic with CO is __ .
- CO2–
- O2+
- CN–
- N2+
Question’s Answer: CN–
What is the bond order of NO molecule?
- 2.5
- 1
- 1.5
- 4
Question’s Answer: 2.5
The common features among the species CO. CN and NO are
- Bond order three and weak field ligands
- Bond order three and strong field ligands
- Bond order two and Pi acceptor
- Isoelectronic and weak field ligands
Question’s Answer: Bond order three and strong field ligands
Which one of following is non-polar?
- CH2Cl2
- CHCl3
- CCL4
- CH3CI
Question’s Answer: CCL4
What are the interactions (intermolecular forces) in HF?
- Dipole-dipole interactions
- Hydrogen bonds
- Dipole-dipole and dispersion forces
- Hydrogen bond and dispersion forces
Question’s Answer: Hydrogen bond and dispersion forces
Strongest intermolecular hydrogen bond is formed in which of the following?
A H2O
- NH3
- H2S
- HF
Question’s Answer: HF
The attraction which exists between carbon dioxide molecules in solid carbon dioxide (or dry ice) is due to
- Molecule-ion forces
- van der Waal’s forces
- Ionic bonds
- Hydrogen bonds
Question’s Answer: van der Waal’s forces
Solid sodium chloride does not conduct electricity because
- In solid NaCl, there is no mobility of ions
- Solid NaCl is covalent in nature
- In solid NaCl, no ions are present
- In solid NaCl, there are no electrons.
Question’s Answer: In solid NaCl, there is no mobility of ions
Which of the mentioned contains both covalent and ionic bond?
- CCl4
- Hâ‚‚O
- CaCl2
- NH4CI
Question’s Answer: NH4CI
The shape of SO42- ion is
- Trigonal planar
- Square planar
- Tetrahedral
- Octahedral
Question’s Answer: Tetrahedral
Electron gas theory fails to explain
- Specific heat of metals
- Electrical and thermal conductivity
- Paramagnetic behavior of metals
- All A, B, and C
Question’s Answer: All A, B, and C
Which one of the following is the true order of interactions?
- Covalent < hydrogen bonding < van der Waal’s < dipole-dipole
- van der Waal’s < hydrogen bonding < dipole-dipole < covalent
- van der Waal’s < < hydrogen bonding < covalent
- Dipole-dipole < van der Waal’s < hydrogen bonding < covalent
Question’s Answer: van der Waal’s < < hydrogen bonding < covalent
The forces present in the crystal of naphthalene is
- van der Waals force
- Electrostatic force
- Covalent force
- Dipole-dipole force
Question’s Answer: van der Waals force
VSEPR theory said that the shape of the SO3 molecule is _____ .
- Pyramidal
- Tetrahedral
- Distorted tetrahedron.
- Trigonal planar
Question’s Answer: Trigonal planar
The strength of binding between atoms is measured in terms of cohesive energy. Which of the mentioned is not true about cohesive energy?
- It increases in a group from top to bottom
- It increases in a period
- It is maximum when electrons are unpaired
- It decreases in a group from top to bottom
Question’s Answer: It increases in a group from top to bottom
Which of the mentioned properties is explained by electron gas model?
- Thermal and electrical conductivity
- Ductility and malleability
- Metallic luster
- All A, B, and C
Question’s Answer: All A, B, and C
Which of the mentioned is a characteristic of van der Waals forces?
- Bond energy —5kJ/mol
- Weak force
- Short range force
- All A, B, and C
Question’s Answer: All A, B, and C
Which of the mentioned process involves the breaking of covalent bonds?
- Formation of atomic chlorine
- Melting of ice
- Evaporation of water
- Sublimation of iodine
Question’s Answer: Formation of atomic chlorine
Which of the mentioned compounds has central atom as sp² hybridized?
- CO2
- SO3
- CO
- N2O
Question’s Answer: SO3
Which of the mentioned molecule is not linear?
- COâ‚‚
- HCN
- CO
- SOâ‚‚
Question’s Answer: SO₂
Which of the mentioned molecule has bond angle of 120°?
- COâ‚‚
- NH3
- BF3
- CH4
Question’s Answer: BF3
Which of the mentioned is effect of van der 12 Waals forces?
- Gases like He, Ne can be liquefied
- Iodine and naphthalene are solids due to these forces
- Ionic crystals also have van der Waals forces
- All A, B, and C
Question’s Answer: All A, B, and C
The shape of SnCl2 molecule is
- Angular
- Linear
- Trigonal planar
- Tetradedral
Question’s Answer: Angular
Which of the mentioned solids does not contain covalent bond?
- Graphite
- Ice
- Diamond
- Copper
Question’s Answer: Copper
Which of the mentioned molecules has unpaired electrons in molecular orbits?
- B2
- F2
- O2
- N2
Question’s Answer: O2
Carbon atom in acetylene is hybridized?
- sp
- sp2
- sp3
- dsp2
Question’s Answer: sp
The number of unpaired electrons in PH3 is
- 2
- 1
- 0
- 3
Question’s Answer: 1
Which of the mentioned molecules is sp hybridized?
- BeCl2
- C2H4
- BF3
- None of A, B, and C
Question’s Answer: BeCl2
What is the bond order of C2 molecule?
- 2.5
- 1
- 2
- 3
Question’s Answer: 2
What is the bond order of N2+ molecule?
- 1.5
- 2
- 2.5
- 3
Question’s Answer: 2.5
The bond order of O2 molecule is
- 2.5
- 2
- 1.5
- 3
Question’s Answer: 1.5
What is the bond order of NO+ ion?
- 4.5
- 2
- 2.5
- 3
Question’s Answer: 3
What is the bond order of N2 molecule?
- 2.5
- 2
- 1.5
- 3
Question’s Answer: 2.5
Which of the mentioned species is paramagnetic?
- C2
- N2
- B2
- F2
Question’s Answer: B2
Which of the mentioned species is diamagnetic?
- N2+
- C2
- N2
- B2
Question’s Answer: C2
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