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 27 of 49
521. If the difference of electronegativity is 1.7 or more than that, the bond formed is said to be:
- A. Ionic bond
- B. Covalent bond
- C. Metallic bond
- D. Chemical bond
Explanation: An ionic bond is formed when the electronegativity difference between two atoms is 1.7 or more.
Correct answer: Ionic bond- A. Lowry concept
- B. Pauling concept
- C. Lewis concept
- D. Arrhenius concept
Explanation: The Lewis concept, proposed by Gilbert N. Lewis, helps us understand the tendencies of elements to form chemical bonds with each other.
Correct answer: Lewis concept- A. An endothermic process
- B. An exothermic process
- C. Neutral process
- D. Energy wasted
Explanation: The addition of a second electron to a uninegative ion (an ion with a single negative charge, such as F⁻) is always an endothermic…
Correct answer: An endothermic process- A. Ionic bond
- B. Covalent bond
- C. Metallic bond
- D. Polar covalent bond
Explanation: The correct answer is A) Ionic bond. An ionic bond is formed by the complete transfer of electrons from one atom to another, resulting in…
Correct answer: Ionic bond- A. 2.8.8,2
- B. 288
- C. 281
- 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).
Correct answer: 288- A. van der Waal forces
- B. Bonds between molecules
- C. Ionic bonds
- D. All of these
Explanation: The correct answer is B) Bonds between molecules. The potential energy of a system primarily comes from the chemical bonds between…
Correct answer: Bonds between molecules- A. Jmo1-1
- B. KJmo1-1
- 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…
Correct answer: KJmo1-1- A. Added
- B. Multiply
- C. Overlap
- D. Divide
Explanation: The correct answer is C) Overlap. According to Valence Bond Theory, the essential condition for chemical bonding is that the orbitals of…
Correct answer: Overlap- A. Large cation and small anion
- B. Large cation and large anion
- C. Small cation and small anion
- D. Small cation and large anion with low charge
Explanation: Ionic bond formation is most favorable when the electrostatic attraction between ions is strong and covalent character is minimal.
Correct answer: Small cation and large anion with low charge- A. 5
- B. 3
- C. 6
- D. 0
Explanation: A careful count of the bonds in the structure of 1,3,5 tricyanobenzene reveals 15 sigma (σ) bonds and 9 pi (π) bonds.
Correct answer: 6- A. SnF4
- B. SnCl4
- C. SnBr4
- D. SnI4
Explanation: SnI₄ is a vibrant orange solid. Its color is due to a charge transfer transition where light is absorbed to promote an electron from the…
Correct answer: SnI4- A. HCl
- B. NH₃
- C. C₂H₂
- D. H₂SO₄
Explanation: In the structure of sulfuric acid (H₂SO₄), the central sulfur atom forms coordinate covalent bonds with two of the oxygen atoms.
Correct answer: H₂SO₄- A. sp > sp² > sp³
- B. sp³ > sp² > sp
- C. sp² > sp > sp³
- D. sp > sp³ > sp²
Explanation: The size of a hybrid orbital is related to its p-character. An sp³ orbital has 75% p-character, sp² has 66.7%, and sp has 50%.
Correct answer: sp³ > sp² > sp- A. CCl₄, SF₄
- B. PCl₃, BF₃
- C. XeF₂, CO₂
- D. PF₅, IF₅
Explanation: Both Xenon difluoride (XeF₂) and Carbon dioxide (CO₂) have a linear molecular shape.
Correct answer: XeF₂, CO₂- A. These are generally "in a solid state" at room temperature
- B. The force of attraction between ions is non-directional
- C. Ionic compounds are soluble in all polar solvents
- D. They conduct electricity in molten and solution state
Explanation: This statement is incorrect because it is an overgeneralization. While many ionic compounds are soluble in polar solvents like water…
Correct answer: The force of attraction between ions is non-directional- A. Around one atom of the molecule
- B. Between the two nuclei of the molecule
- C. At the region away from the nuclei of the molecule
- D. At no place
Explanation: An antibonding molecular orbital is formed by the destructive interference of atomic orbitals.
Correct answer: Between the two nuclei of the molecule- A. F⁻
- B. O²⁻
- C. N³⁻
- D. Na⁺
Explanation: These ions are isoelectronic, meaning they all contain the same number of electrons.
Correct answer: N³⁻- A. A⁻ > A > A⁺
- B. A > A⁺ > A⁻
- C. A⁺ > A > A⁻
- D. A⁻ > A⁺ > A
Explanation: An anion (A⁻) is larger than its neutral atom (A) because the added electron increases electron-electron repulsion.
Correct answer: A⁻ > A > A⁺- A. Li
- B. H
- C. Be
- D. He
Explanation: Ionization energy generally increases across a period and up a group. Helium (He) is at the top right of the periodic table, has a very…
Correct answer: He- A. Greater
- B. Zero
- C. Lesser
- D. Variable
Explanation: The shielding effect is the repulsion between inner-shell and outer-shell electrons.
Correct answer: Lesser