NEET UG CHEMISTRY Multiple Choice Questions (MCQs)
NEET UG - Chemical Bonding and Molecular Structure MCQs
NEET UG - Chemical Bonding and Molecular Structure
31. Which of the following statements is correct about the ionic bond?
a) It is formed by the sharing of electrons.
b) It is formed by the transfer of electrons from one atom to another.
c) It involves the overlapping of atomic orbitals.
d) It involves the sharing of a pair of electrons between atoms.
Answer: b) It is formed by the transfer of electrons from one atom to another.
32. According to the Kossel-Lewis approach, an ionic bond is formed by:
a) Sharing of electron pairs.
b) Transfer of electrons.
c) Overlapping of atomic orbitals.
d) Formation of a dipole moment.
Answer: b) Transfer of electrons.
33. The lattice enthalpy of an ionic compound is influenced by:
a) The ionic size and the charge on the ions.
b) The molecular weight of the compound.
c) The nature of the solvent.
d) The type of bond between ions.
Answer: a) The ionic size and the charge on the ions.
34. Which of the following compounds exhibits covalent bonding?
a) NaCl
b) MgO
c) H₂O
d) CaCl₂
Answer: c) H₂O
35. The dipole moment of a molecule is the result of:
a) The difference in electronegativity between the atoms.
b) The sharing of electrons between atoms.
c) The ionic bond between atoms.
d) The non-polar covalent bonding between atoms.
Answer: a) The difference in electronegativity between the atoms.
36. Fajan's Rule is used to predict:
a) The geometry of molecules.
b) The type of bond formed between atoms.
c) The dipole moment of molecules.
d) The energy of orbitals in molecules.
Answer: b) The type of bond formed between atoms.
37. The shape of a molecule in VSEPR theory is determined by:
a) The number of valence electrons in the molecule.
b) The number of bonds and lone pairs around the central atom.
c) The energy of the atomic orbitals.
d) The type of hybridization of orbitals.
Answer: b) The number of bonds and lone pairs around the central atom.
38. Which of the following molecules has a trigonal planar shape according to VSEPR theory?
a) CH₄
b) BF₃
c) H₂O
d) NH₃
Answer: b) BF₃
39. Hybridization involving s, p, and d orbitals is explained by:
a) Molecular Orbital Theory
b) Valence Bond Theory
c) Fajan's Rule
d) Quantum Mechanics
Answer: b) Valence Bond Theory
40. In Valence Bond Theory, the concept of hybridization is used to explain:
a) The bond angles in molecules.
b) The formation of molecular orbitals.
c) The atomic radius of elements.
d) The solubility of molecules in water.
Answer: a) The bond angles in molecules.
41. The molecular orbital theory explains that bonding and antibonding orbitals are formed by:
a) The combination of two or more atomic orbitals.
b) The sharing of electron pairs.
c) The transfer of electrons between atoms.
d) The overlap of p-orbitals.
Answer: a) The combination of two or more atomic orbitals.
42. In Molecular Orbital Theory, the bond order of a molecule is calculated by:
a) The difference between the number of bonding and antibonding electrons, divided by two.
b) The number of electrons in bonding orbitals.
c) The sum of the atomic numbers of the bonding atoms.
d) The average distance between atoms.
Answer: a) The difference between the number of bonding and antibonding electrons, divided by two.
43. In the molecular orbital diagram of the homonuclear diatomic molecule, the bonding orbitals are:
a) Higher in energy than the antibonding orbitals.
b) Lower in energy than the antibonding orbitals.
c) Equal in energy to the antibonding orbitals.
d) Not involved in bonding.
Answer: a) Higher in energy than the antibonding orbitals.
44. The bond length in a molecule is inversely proportional to:
a) Bond energy.
b) Bond order.
c) Atomic radius.
d) Electronegativity.
Answer: b) Bond order.
45. Hydrogen bonding is:
a) A type of covalent bond.
b) A force between two hydrogen atoms.
c) A special case of dipole-dipole interaction.
d) The result of electron transfer.
Answer: c) A special case of dipole-dipole interaction.
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