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 33 of 49
- A. HF
- B. HCl
- C. HBr
- D. HI
Explanation: Considering the electronegativity trends, Down the group electronegativity of elements in the periodic table decreases while the value…
Correct answer: HF- A. Ionic
- B. Covalent
- C. Dative
- D. Metallic
Explanation: Zinc is a metal. All metals exhibit metallic bonding between their atoms.
Correct answer: Metallic- A. II B
- B. IV B
- C. III B
- D. V B
Explanation: The binding energy of transition metals increases up to Group V B because the binding energy of transition metals increases as we move…
Correct answer: V B- A. HF
- B. H2O
- C. H2S
- D. NH3
Explanation: Fluorine is the most electronegative element. H−F bond has maximum bond polarity. Hence, hydrogen bonding is the maximum in HF molecules.
Correct answer: HF- A. Energy decreases
- B. Energy increases
- C. Energy doesnot change
- D. Energy first increases then decreases
Explanation: During bond formation, energy is released thus energy of the reacting substances is decreased or reduced.
Correct answer: Energy decreases- A. Ionic bond
- B. Hydrogen bond
- C. Dative bond
- D. Covalent bond
Explanation: Ionic bond is a type of primary bond because an ionic bond is formed when valence electrons are transferred from atom to another to…
Correct answer: Hydrogen bond- A. kJ/mol
- B. Calories
- C. Joules
- D. Volt
Explanation: Bond energy is typically expressed in units of kilojoules per mole (kJ/mol) or kilocalories per mole (kcal/mol).
Correct answer: kJ/mol- A. Exothermic process
- B. Endothermic process
- C. Neutral process
- D. Sublimation process
Explanation: The conversion of sodium into sodium ions involves the removal of one electron from a sodium atom, resulting in the formation of a sodium…
Correct answer: Endothermic process- A. Angular
- B. Tetrahedral
- C. Linear
- D. Planar
- E. Pyramidal
Explanation: The shape of an ammonia (NH₃) molecule is trigonal pyramidal. This geometry arises because Nitrogen is at the center, bonded to three…
Correct answer: Pyramidal- A. Molecular orbital theory
- B. Hybridization
- C. Valence bond theory
- D. Valence shell electron pair repulsion theory
Explanation: Molecular Orbital Theory (MOT): This theory accounts for paramagnetism by considering the arrangement of electrons in molecular orbitals…
Correct answer: Valence bond theory- A. Trigonal
- B. Tetrahedral pyramidal
- C. Planar
- D. Linear
- E. Regular tetrahedral
Explanation: Tetrahedral pyramidal molecular shape, often referred to as trigonal pyramidal, occurs when a central atom is bonded to three other atoms…
Correct answer: Tetrahedral pyramidal- A. Pyramidal
- B. Bent
- C. Triangle
- D. Tetrahedral
- E. Linear
Explanation: Linear molecular shape occurs when atoms are arranged in a straight line, typically resulting from two atoms bonded with no lone pairs on…
Correct answer: Linear- A. NaCl
- B. CaO
- C. NH3BF3
- D. H2O
Explanation: The nitrogen atom in NH₃ donates its lone pair to the boron atom in BF₃, forming a coordinate covalent bond where both electrons in the…
Correct answer: NH3BF3- A. It determines the shape of molecule
- B. Pairs of electrons repel each other.
- C. It helps in understanding the interaction of medicinal drug molecules.
- D. Only lone pairs participate in determining geometry of molecules.
Explanation: No, both bonding pairs and lone pairs of electrons contribute to determining the geometry of molecules.
Correct answer: Only lone pairs participate in determining geometry of molecules.- A. Mg
- B. S
- C. P
- D. Na
Explanation: S will have the smallest atomic radius because it lies at the end among the mentioned elements.
Correct answer: S- A. paired electrons in d orbitals
- B. paired electrons in p orbitals
- C. unpaired electrons in d orbitals
- D. unpaired electrons in p orbitals
Explanation: Diamagnetic substances have all their electrons paired and are not attracted to a magnetic field.
Correct answer: paired electrons in p orbitals- A. Ammonia
- B. Carbon dioxide
- C. Hydrogen fluoride
- D. Water
Explanation: Has a dipole moment of 0 D because it is a linear molecule with symmetrical charge distribution; the dipoles of the C=O bonds cancel each…
Correct answer: Carbon dioxide- A. CH4
- B. NH3
- C. H2O
- D. C2H4
Explanation: NH3 has a pyramidal structure because the central nitrogen atom has 3 single bonds and 1 lone pair of electrons.
Correct answer: NH3- A. NH3
- B. NF3
- C. BF3
- D. H2O
Explanation: The dipole moment of BF3 is zero because the molecule is symmetrical. The three B-F bonds are arranged in a trigonal planar configuration…
Correct answer: BF3- A. Parallel to sp2 orbitals
- B. In the same plane as sp2 orbitals
- C. Perpendicular to sp2 orbitals
- D. Out of the plane of sp2 orbitals
Explanation: In sp2 hybridization, the unhybridized "p" orbital is perpendicular to the plane formed by the three sp2 hybrid orbitals.
Correct answer: Perpendicular to sp2 orbitals