Free Chemical Bonding MCQs with Answers

• A. Angular
• B. Trigonal pyramidal
• C. Tetrahedral
• D. See-saw

Explanation: An AB₄ molecule has a central atom bonded to four surrounding atoms. Such species can adopt geometries like tetrahedral (AX₄), see-saw…

• A. Br-Br > I-I
• B. Cl-Cl < F-F
• C. C≡ C < N≡ N
• D. All are correct

Explanation: This statement is incorrect. While bond energy generally increases up a group, the F-F bond is anomalously weak due to strong repulsion…

• A. I only
• B. I and II only
• C. I and III only
• D. II only
• E. I, II and III

Explanation: Bond energy is a critical concept in understanding chemical bonding and is defined through multiple perspectives:Option I: It is indeed…

• A. 4 hydrogen bonds
• B. 3 hydrogen bonds
• C. 2 hydrogen bonds
• D. 1 hydrogen bond

Explanation: Each water (H₂O) molecule can form four hydrogen bonds in total:2 hydrogen atoms → can each form 1 hydrogen bond (as donors)2 lone pairs…

• A. Nitrogen is a poor conductor of heat and electricity.
• B. Nitrogen forms not only acidic oxides.
• C. Nitrogen has the greatest tendency to attract electrons.
• D. The compounds formed by nitrogen are predominantly covalent.

Explanation: The correct answer is Option C: Nitrogen has the greatest tendency to attract electrons.

• A. HCl
• B. HBr
• C. HI
• D. HF

Explanation: The ionic character of a bond is largely determined by the difference in electronegativity between the two bonded atoms.

• A. Unit molecule
• B. Unit cell
• C. Unit crystal
• D. All of these options are correct

Explanation: A 'unit cell' is the smallest group of atoms that has the overall symmetry of a crystal, and from which the entire lattice can be built up…

• A. Smaller.
• B. Greater
• C. None of these
• D. Lower

Explanation: The greater the amount of negative charge on an atom, the size of the ion will also be greater.

• A. Electron pool theory
• B. Valence bond theory
• C. Band Theory
• D. None of these options are correct

Explanation: The molecular theory for metals is called band theory. Band theory is a quantum mechanical model that explains the behavior of electrons…

• A. Always form Pi(π) bond
• B. Always form Sigma(σ) bond
• C. Neither form σ 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.

• A. F→ F
• B. Cl→ Cl
• C. O→ O
• D. H2→2H

Explanation: The amount of energy released when an electron is added to an atom is termed as electron affinity.

• A. Intramolecular hydrogen bonds
• B. Disulfide bonds
• C. A rippled effect
• D. Hydrophobic interactions

Explanation: A. a-helix and beta pleated sheets have hydrogen bonding so Option A is correct.B.

• A. CH4
• B. PCl5
• C. NH4+
• D. PCl3

Explanation: The correct answer is PCl3. In PCl3, the central phosphorus atom forms three single bonds with chlorine atoms and has one lone pair of…

• A. Angular
• B. Trigonal pyramidal
• C. Tetrahedral
• D. None

Explanation: An angular geometry has 2 electron groups around the central atom, and an AB4 type molecule has 4 electron groups around the central atom.

• A. Ionic bonds are formed between atoms of elements with very different electronegativities, while covalent bonds are formed between atoms of elements with similar electronegativities.
• B. Covalent compounds have low melting and boiling points, whereas ionic compounds have high melting and boiling points.
• C. Ionic bonds are directional, while covalent bonds are non-directional.
• D. Covalent compounds are poor conductors of electricity, whereas ionic compounds are good conductors of electricity when molten or in solution.

Explanation: Ionic bonds are formed between atoms of different elements with very different electronegativities.

• A. Inter-titan distance R
• B. Interionic distance R
• C. Inter-cationic distance R+
• D. Inter-anionic distance R-

Explanation: Option B is correct.The sum of cationic and anionic radius in a crystal lattice is equal to the interionic distance.

• A. 2, 8, 8, 2
• B. 2, 8, 8
• C. 2, 8, 1
• D. 2, 888

Explanation: The correct answer is B) 288. Potassium (K) becomes K+ by losing one electron and achieving an electronic configuration of (2, 8, 8).

• A. J mol-1
• B. kJ mol-1
• C. kJ atom-1
• D. J atom-1

Explanation: The correct answer is B) kJ mol^-1. The unit of electron affinity is kilojoules per mole (kJ mol^-1), which represents the energy change…

• A. All are present in the solid state
• B. All conduct electricity in the molten state
• C. All show polymorphism and isomerism
• D. All have non-directional and non-rigid bonds

Explanation: The correct answer is Option C: All show polymorphism and isomerism.Ionic compounds typically do not exhibit isomerism because their…

• A. Pairing of electrons
• B. Shifts of atoms
• C. Sharing of electrons
• D. None of the above

Explanation: The HF bond is formed by the sharing of the electrons, resulting in a strong bond that is highly polar.