Free Chemical Bonding MCQs with Answers
964 Chemical Bonding MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.
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Read the Chemical Bonding notesFree MDCAT chapter notes with key terms964 questions · page 47 of 49
921. If the electronegativity difference between bonded atoms is zero, the bond between the two atoms is:
- A. Polar
- B. Partially Ionic
- C. Non-polar
- D. Both B and C
Explanation: Explanation:If the electronegativity difference between bonded atoms is zero, the bond between the two atoms is non-polar.This option is…
Correct answer: Non-polar- A. NH3
- B. CHCl3
- C. BF3
- D. H2O
Explanation: A is incorrect because NH3 molecule has dipole moment 1.49B is incorrect because CHCl3 molecule has dipole moment 1.01C is correct since…
Correct answer: BF3- A. sp3
- B. sp2
- C. sp
- D. All of these
Explanation: In hybridization, carbon's 2s and three 2p orbitals combine into four identical orbitals, now called sp3 hybrids.
Correct answer: sp3- A. sp2
- B. sp3
- C. dsp2
- D. sp
Explanation: Explanation:The linear shape is associated with a set of hybrid orbitals that are sp-hybridized. This option is not correct.
Correct answer: sp- A. Hybridization
- B. Protonation
- C. Deprotonation
- D. Dissociation
Explanation: A is correct as geometry of complexes in dependent upon hybridizationHybridization is the idea that atomic orbitals fuse to form newly…
Correct answer: Hybridization- A. sp-s overlap
- B. sp3-sp3 overlap
- C. 2py-2py overlap
- D. sp-sp overlap
Explanation: A is incorrect as sp-s overlap isnt present in ethyne molecule.B is incorrect as sp3-sp3 overlap isnt present in ethyne molecule.C is…
Correct answer: sp-sp overlap- A. Ionic
- B. Covalent
- C. Coordinate covalent
- D. All of these
Explanation: In the NH4Cl molecule, an ionic bond is formed between NH4+ and Cl- ions. 3 covalent bonds are formed between N and three H atoms.
Correct answer: All of these- A. Attraction between atoms
- B. Size of molecule
- C. Nature of bond
- D. Shape of molecule
Explanation: Explanation:VESPR theory helps in explaining shape of molecules. The attraction between atoms is mainly explained by different theories…
Correct answer: Shape of molecule929. What happens to the molecule when its atoms are brought closer than the bond length between them?
- A. Molecule becomes unstable
- B. Molecule becomes more stable
- C. Molecule starts vibrating
- D. Stability of the molecule remains unchanged.
Explanation: Bond length is defined as the distance between two nuclei of atoms in a covalent bond.
Correct answer: Molecule becomes unstable- A. Atoms in the O2 molecules are held by a double bond
- B. 0-0 bonds are strong
- C. The amount of metal in the anode
- D. All of the above
Explanation: Atoms in an Oxygen molecule are held together by a double bond. O-O single bonds have a bond length of 1.48 angstrom, while O-O double…
Correct answer: Atoms in the O2 molecules are held by a double bond- A. HCl
- B. HF
- C. H2O
- D. CO2
Explanation: CO2 is the correct answer because even though it contains polar bonds between C and O, its linear molecular geometry results in the…
Correct answer: CO2- A. B....Cl
- B. C....Cl
- C. C....I
- D. C....Br
Explanation: CI represents the bond between carbon (C) and iodine (I), which has the least electronegativity, resulting in the least polar bond.
Correct answer: C....I- A. Br
- B. SiF
- C. CaO
- D. SeH2
Explanation: A covalent bond is not likely to exist in CaO. Calcium is a metal, and oxygen is a non-metal.
Correct answer: CaO- A. HF
- B. HI
- C. HCl
- D. HBr
Explanation: To determine the polarity of diatomic molecules, we examine the difference in electronegativity between the two atoms.
Correct answer: HI- A. sp
- B. sp2
- C. d2s
- D. p2
Explanation: Trick: See the number of electron clouds around the C atom (1 electron cloud= single bond/double bond/ triple bond).
Correct answer: sp2- A. SP hybridized
- B. SP2 hybridized
- C. SP3 hybridized
- D. None of the above
Explanation: In a carbonyl, the carbon atom is double-bonded to an oxygen atom and single-bonded to another atom.
Correct answer: SP2 hybridized- A. PH3
- B. NH3
- C. SbH3
- D. C2H2
Explanation: Each carbon in C₂H₂ is sp hybridized, it forms two sigma bonds (one with H, one with C) and uses two unhybridized p orbitals for the π…
Correct answer: C2H2- A. C2H6
- B. C3H6
- C. C4H6
- D. C4H8
Explanation: The compound C4H6, also known as butadiene, has four carbon atoms and two double bonds. Each carbon atom is bonded to one hydrogen atom.
Correct answer: C4H6- A. sp2 hybridization
- B. sp hybridization
- C. sp3 hybridization
- D. dsp2 hybridization
Explanation: The correct hybridization for BeCl2 is sp, which occurs when there are two electron domains around the central atom.
Correct answer: sp hybridization- A. HC = CH
- B. H2C = CH2
- C. H2C = C= CH2
- D. CH2= CHCH3
Explanation: The C-C sigma bond in ethylene is formed by the overlap of an sp2 hybrid orbital from each carbon.
Correct answer: H2C = CH2