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 19 of 49
- A. Sigma Bond
- B. Pi-Bond
- C. Hydrogen Bond
- D. Metallic Bond
Explanation: When two partially filled (half-filled) atomic orbitals overlap in such a way that the probability of finding the electrons is maximum…
Correct answer: Sigma Bond- A. Lone Pair - Lone Pair > Lone Pair - Bond Pair > Bond Pair - Bond Pair
- B. Lone Pair - Bond Pair > Lone Pair - Lone Pair > Bond Pair - Bond Pair
- C. Bond Pair - Bond Pair > Lone Pair - Lone Pair > Lone Pair - Bond Pair
- D. Lone Pair - Bond Pair > Bond Pair - Bond Pair > Lone Pair - Lone Pair
Explanation: According to the VSEPR theory, lone pairs of electrons occupy more space than bonding pairs.
Correct answer: Lone Pair - Lone Pair > Lone Pair - Bond Pair > Bond Pair - Bond Pair- A. Four H-atoms
- B. Three H-atoms
- C. One H-atom
- D. Two H-atoms
Explanation: In the solid state (ice), intermolecular interactions lead to a highly ordered but loose structure in which each oxygen atom is surrounded…
Correct answer: Four H-atoms- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: CO forms a coordinate bond. Carbon has 4 valence electrons and oxygen has 6.
Correct answer: Option A- A. 1π and 5σ bonds
- B. 2π and 4σ bonds
- C. 3π and 3σ bonds
- D. 6π and 6σ bonds
Explanation: The given structure is ethene; we know ethene forms a double bond. Carbon can form four bonds in ethene; each carbon forms three sigma…
Correct answer: 1π and 5σ bonds- A. 90˚
- B. 119.5˚
- C. 104.5˚
- D. 120˚
Explanation: There are no lone pairs in the central atom B. Since the central atom has 3 peripheral atoms (3 F atoms) and no lone pairs, it will…
Correct answer: 120˚- A. Always form Pi(π) bond
- B. Always form Sigma(a) bond
- C. Neither form "a" nor "π" bond
- D. Form more reactive and more unstable "π" bond
Explanation: Unhybridized orbitals can only form π bonds upon sideways or parallel overlap and cannot form sigma bonds.
Correct answer: Always form Pi(π) bond- A. sp2 and sp2
- B. sp2 and sp3
- C. sp3 and sp3
- D. sp3 and sp2
Explanation: In the carbon dioxide molecule, oxygen hybridizes its orbitals to produce three sp2 hybrid orbitals.
Correct answer: sp2 and sp3- A. 10
- B. 7
- C. 8
- D. 9
Explanation: Oxygen atoms contribute ground-state molecular orbitals from 1s, 2s, and 2p electrons. The 1s orbitals form σ1s and σ*1s filled Mos.
Correct answer: 10- A. AlCl3
- B. CH4
- C. 1,4 − Dibromobenzene
- D. All of the above
Explanation: Specie with dipole moment equal to zero is: 𝐴𝑙𝐶𝑙3 𝐶𝐻4 1,4 − 𝐷𝑖𝑏𝑟𝑜𝑚𝑜𝑏𝑒𝑛𝑧𝑒𝑛𝑒 because their structures allow for their…
Correct answer: All of the above- A. HF
- B. NH3
- C. H2O
- D. All have equal boiling points
Explanation: Each water molecule has two hydrogen atoms. Whereas, each HF molecule has only one hydrogen atom.
Correct answer: H2O- A. Surface area
- B. Temperature
- C. Both (A) & (B)
- D. None of the above
Explanation: Evaporation depends upon Surface area & Temperature.
Correct answer: Both (A) & (B)- A. Tetrahedral
- B. Trigonal pyramidal
- C. Angular
- D. Linear
Explanation: If there are two bond pairs and two lone pairs of electrons the molecular geometry is angular or bent (e.g. H2O).
Correct answer: Angular- A. N-3
- B. S-2
- C. P-3
- D. F-1
Explanation: Fe is the symbol for iron (a transition metal), and S is the symbol for sulfur (a nonmetal).
Correct answer: S-2- A. N
- B. O
- C. C
- D. B
Explanation: The first ionization decreases from beryllium to boron, and from magnesium to aluminum, as electrons from the p-block start to come into…
Correct answer: B- A. Small size of oxygen atom
- B. Greater E.N of oxygen atom
- C. Oxygen contain two bone pairs of electrons
- D. All of the above
Explanation: Bond angle of H2S(92° )<H2O(104°). As the electronegativity of the central atom decreases, bond angle decreases.
Correct answer: Greater E.N of oxygen atom- A. σ1s<σ*1s< σ2s< σ* 2s< σ2px< π2py = π2pz
- B. σ1s<σ*1s< σ2s<σ*2s< π2py = π2pz<π2px
- C. σ1s<σ*1s< σ2s<σ*2s< π2px = π2pz< π2py
- D. σ1s<σ*1s< σ2s<σ*2s< π2py< π2pz< π2px
Explanation: Explanation for this question will be added shortly.
Correct answer: σ1s<σ*1s< σ2s< σ* 2s< σ2px< π2py = π2pz- A. Hydration
- B. Neutralization
- C. Hydrolysis
- D. Ionization
Explanation: Hydration is inversely propotional to conductance. In hydration, ions are surrounded by water molecules so their conductance decreases.
Correct answer: Hydration- A. Covalent, Covalent
- B. Covalent, Ionic
- C. Metallic, Covalent
- D. Metallic, Ionic
Explanation: Since hydrogen is released, we can assume that X is an electropositive element, almost surely a metal, so X will have metallic bonding.
Correct answer: Metallic, Ionic- A. sp hybridization
- B. sp2 hybridization
- C. sp3 hybridization
- D. dsp3 hybridization
- E. d2sp2 hybridization
Explanation: Carbon can undergo all three hybridization i.e. sp, sp2 and sp3. Carbon can have an sp hybridization when it is bound to two other atoms…
Correct answer: sp hybridization