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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- A. moles
- B. molecules
- C. atoms
- D. all of these
Explanation: In nonpolar molecules, there are induced dipole-dipole forces and its strength is dependent on the number of electrons hence the number of…
Correct answer: atoms- A. Polar, nonpolar
- B. Nonpolar, neutral
- C. Polar, neutral
- D. Neutral, nonpolar
Explanation: In CCl4, all C-Cl bonds are polar, but the molecule is nonpolar overall.Each C-Cl bond in CCl4 is polar due to the difference in…
Correct answer: Polar, nonpolar- A. 135 KJ/mol
- B. 145 KJ/mol
- C. 155 KJ/mol
- D. 1451 KJ/mol
Explanation: Elements with a greater number of electrons have more than one value of ionization energy.
Correct answer: 1451 KJ/mol- A. Second group
- B. Second period
- C. Higher groups
- D. Higher periods
Explanation: The decrease in atomic radii is very prominent in the second period. As you go across any period the atomic number or proton number…
Correct answer: Second period- A. Joule
- B. Kilojoules
- C. Watt
- D. No unit
Explanation: A) Joule, B) Kilojoules, and C) Watt are all units of energy or power, which do not apply to the concept of electronegativity.Option D…
Correct answer: No unit- A. Na → Na++ e-
- B. Ca → Ca++ e-
- C. K → K++ e-
- D. C2+→ C3+ + e-
Explanation: In Option D, an electron is being removed from an already positively charged ion, not a neutral atom like the others.
Correct answer: C2+→ C3+ + e-- A. Nuclear charge
- B. Number of electrons
- C. Shielding effect
- D. Ionization energy
Explanation: The shielding effect remains the same across a period because the number of shells is the same for each element in the period.
Correct answer: Shielding effect- A. 2s orbital
- B. 2p orbital
- C. 1s orbital
- D. All of these
Explanation: Hydrogen, in its neutral state, has one electron in its 1s orbital. Fluorine, on the other hand, has seven electrons in its 2s and 2p…
Correct answer: 2p orbital- A. Transition elements
- B. Non-transition elements
- C. Only alkali metals
- D. Alkaline earth metals
Explanation: Nyholm and Gillespie (1957) refined the VSEPR model by explaining the important difference between the lone pair and bonding pairs of…
Correct answer: Non-transition elements- A. XeF2
- B. XeOF2
- C. XeO3
- D. All of these options are correct
Explanation: Xenon, being a noble gas and having an octet valence electron configuration, is an inert gas.
Correct answer: All of these options are correct- A. Cardiac
- B. Epithelial
- C. Connective
- D. Epidermis
Explanation: Collagen is the principal protein of the skin, tendons, ligaments, cartilage, bone, and connective tissue.
Correct answer: Connective- A. Combustion
- B. Dissociation
- C. Dissolution
- D. Formation
Explanation: The lattice energy of an ionic crystal is the enthalpy of formation.In the context of ionic compounds, the lattice energy is the enthalpy…
Correct answer: Formation- A. Aqueous sugar solution
- B. Solid graphite
- C. Solid sodium chloride
- D. Gaseous carbon dioxide
Explanation: Graphite is an allotrope of carbon and is known for its high electrical conductivity.
Correct answer: Solid graphite- A. Released
- B. Absorbed
- C. Remain same
- D. Constant
Explanation: The correct answer is Option A: Released. When oppositely charged ions approach each other, they exert attractive forces, leading to the…
Correct answer: Released- A. 8
- B. 10
- C. 9
- D. 12
Explanation: To determine the total number of valence electrons in CH4 (methane), we need to consider the valence electrons of each atom in the…
Correct answer: 8- A. Ionic
- B. Polar covalent
- C. Non-polar covalent
- D. Metallic
Explanation: The bond between two atoms is non-polar covalent if the electronegativity difference between them is zero or less than 0.5.
Correct answer: Polar covalent- A. HF
- B. HBr
- C. Hl
- D. H2O
Explanation: The covalent bond with the highest ionic character is HF. This is because fluorine has the highest electronegativity of any element on the…
Correct answer: HF- A. NH3
- B. HCl
- C. AlCl3
- D. CCl4
Explanation: AlCl3 does not follow the octet rule. Aluminum has 3 valence electrons, so it needs 5 more to have an octet.
Correct answer: AlCl3- A. IA and IIA
- B. IB and VIIB
- C. IA, IIA and VIIA
- D. IA and IB
Explanation: In ionic compounds, one element donates electrons (typically a metal or an element with low electronegativity), becoming a positively…
Correct answer: IA, IIA and VIIA- A. 100% covalent
- B. 100% ionic
- C. Partially ionic
- D. Both A and C
Explanation: A covalent bond may be partially ionic or 100% covalent because the electrons that are shared between the two atoms may not be shared…
Correct answer: Both A and C