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 3 of 49
- A. s-orbitals
- B. p-orbitals
- C. sp3 hybrid orbitals
- D. sp2 hybrid orbitals
Explanation: Each doubly bonded carbon uses three sp2 hybrids for its sigma bonds and keeps one unhybridised p orbital, and the sideways overlap of…
Correct answer: p-orbitals- A. Bent or angular
- B. Trigonal
- C. Trigonal pyramidal
- D. Trigonal planar
Explanation: Four regions of electron density arrange themselves tetrahedrally, but only the three bonded atoms are visible, so the shape is a pyramid…
Correct answer: Trigonal pyramidal- A. MOT
- B. VBT
- C. VSEPR
- D. CFT
Explanation: Crystal field theory deals with how the d orbitals of a transition metal ion are split by the surrounding ligands, so it explains colour…
Correct answer: CFT- A. sp > sp2 > sp3
- B. sp3 > sp > sp2
- C. sp2 > sp > sp3
- D. sp3 > sp2 > sp
Explanation: The greater the s character, the closer the orbital is held to the nucleus and the smaller it is, and s character rises from 25 per cent…
Correct answer: sp3 > sp2 > sp- A. 110Kcal/mol
- B. 106Kcal/mol
- C. 104Kcal/mol
- D. 150KJcal/mol
Explanation: The H-H bond dissociation energy is about 436 kJ mol^-1, which is approximately 104 kcal mol^-1 because 1 kcal = 4.184 kJ and 436 kJ…
Correct answer: 104Kcal/mol- A. 456kJ/mol
- B. 562kJ/mol
- C. 281kJ/mol
- D. None
Explanation: The H-F bond is very strong, with a bond dissociation energy of approximately 562 kJ/mol, so option b is the closest value.
Correct answer: 562kJ/mol- A. 75.2pm
- B. 75.3pm
- C. 75.5pm
- D. 75.4pm
Explanation: The equilibrium internuclear distance in a hydrogen molecule is approximately 75.4 pm, where attractive and repulsive forces balance to…
Correct answer: 75.4pm- A. EA. Higher than individual
- B. Lesser than individual
- C. No change
- D. Impossible to predict
Explanation: When atoms form a stable compound, energy is released and the bonded system has lower potential energy than the separate atoms.
Correct answer: Lesser than individual- A. Fluorine
- B. Chlorine
- C. Iodine
- D. Bromine
Explanation: The F-F bond is unusually weak because the small fluorine atoms bring their lone pairs into strong repulsion, while the larger halogens…
Correct answer: Chlorine- A. 1
- B. 2.3
- C. 0
- D. 1.8
Explanation: CS2 is a linear, symmetrical molecule, so the two equal C=S bond dipoles point in opposite directions and cancel; its net dipole moment is…
Correct answer: 0- A. Pressure
- B. Bond length
- C. Work
- D. Dipole moment
Explanation: Dipole moment measures the separation of positive and negative charge in a bond and is given by μ = q × r, where q is charge and r is the…
Correct answer: Dipole moment- A. HF
- B. CH4
- C. H2
- D. N2
Explanation: HF has a polar covalent bond because fluorine is much more electronegative than hydrogen, so the shared electrons are attracted unequally.
Correct answer: HF- A. H2O
- B. HF
- C. HCI
- D. HBr
Explanation: HF has the greatest electronegativity difference among these hydrogen compounds, so its H-F bond has the highest percentage ionic…
Correct answer: HF- A. Debye
- B. Poise
- C. Pascal
- D. Newton
Explanation: Dipole moment is commonly measured in Debye, where the value depends on the magnitude of separated charge and the distance between the…
Correct answer: Debye- A. Electron affinity
- B. Ionic character
- C. Ionization energy
- D. Dipole moment
Explanation: Dipole moment measures the separation of positive and negative charge in a molecule, so it gives a quantitative measure of molecular…
Correct answer: Dipole moment56. Which of the following is the best explanation that CO2 is non polar molecule __________________?
- A. Linear geometry
- B. Dipole moment is zero
- C. Sp hybridization
- D. None
Explanation: CO2 is linear and symmetrical, so the two equal C=O bond dipoles point in opposite directions and cancel, giving a net dipole moment of…
Correct answer: Dipole moment is zero- A. CCI4
- B. CO2
- C. BF3
- D. none of the above
Explanation: CCl4, CO2 and BF3 all contain polar bonds, but their symmetrical shapes make the bond dipoles cancel, giving each molecule zero net dipole…
Correct answer: none of the above- A. sp hybridised carbon atoms only
- B. sp3 hybridised carbon atoms only
- C. both sp and sp2 hybridised carbon atoms
- D. both sp and sp3 hybridised carbon atoms
- E. All types of carbons with sp,sp2,Sp3
Explanation: The structure of 2-butyne is CH3-C≡C-CH3. The two carbons in the triple bond are sp hybridised, while the two methyl carbons form four…
Correct answer: both sp and sp3 hybridised carbon atoms- A. Sp3 hybrid having 8 electrons
- B. Sp2 hybrid having 6 electron
- C. sp2 hybrid having 7 electron
- D. Sp hybrid having linear geometry
Explanation: A methyl radical, CH3·, has three sigma bonds and one unpaired electron, so its carbon is approximately sp2 hybridized with trigonal…
Correct answer: sp2 hybrid having 7 electron- A. Sp
- B. Sp2
- C. Sp3
- D. It is not hybridized
Explanation: The nitrogen atom in pyridine is sp2 hybridized because it forms three sp2-based sigma bonds in a planar aromatic ring, while its…
Correct answer: Sp2