Chemical bonding is the force that holds atoms together in compounds. Understanding bonding explains the properties, shapes, and reactivity of substances. This Chemical Bonding Quiz covers types of bonds, bond formation, and their effects on chemical behavior. Score yourself over 20 at the end with answers and explanations.
CHEMICAL BONDING QUIZ (OBJECTIVE QUESTIONS)
1. Chemical bonds are formed by the
A. Transfer or sharing of electrons
B. Transfer of protons
C. Transfer of neutrons
D. Transfer of atoms only
2. Ionic bonds are formed between
A. Two metals
B. Metal and nonmetal
C. Two nonmetals
D. Nonmetal and noble gas
3. Covalent bonds involve
A. Complete transfer of electrons
B. Sharing of electrons
C. Transfer of protons
D. Formation of ions only
4. Metallic bonds are found in
A. Ionic compounds
B. Covalent compounds
C. Metals
D. Gases
5. Which of the following is an example of an ionic compound?
A. NaCl
B. H₂O
C. CH₄
D. O₂
Chemical Bonding Quiz
6. Which of the following is an example of a covalent compound?
A. KBr
B. H₂O
C. NaCl
D. MgO
7. In NaCl, sodium
A. Gains an electron
B. Loses an electron
C. Shares an electron
D. Gains a proton
8. In NaCl, chlorine
A. Gains an electron
B. Loses an electron
C. Shares an electron
D. Loses a proton
9. Ionic compounds generally
A. Have low melting points
B. Conduct electricity when molten
C. Are soft solids
D. Are gases at room temperature
10. Covalent compounds generally
A. Conduct electricity
B. Have low melting points
C. Form lattices
D. Are always metals
Chemical Bonding Quiz
11. Metallic bonds explain
A. High conductivity of metals
B. Low melting points
C. Non-reactivity
D. Gas formation
12. A polar covalent bond occurs when
A. Electrons are shared equally
B. Electrons are shared unequally
C. Electrons are transferred
D. Atoms do not bond
13. Nonpolar covalent bonds occur when
A. Electrons are shared equally
B. Electrons are shared unequally
C. Electrons are transferred
D. Atoms form ions
14. Which bond is strongest generally?
A. Ionic
B. Covalent
C. Metallic
D. Hydrogen
15. Hydrogen bonding is a type of
A. Ionic bond
B. Covalent bond
C. Intermolecular force
D. Metallic bond
Chemical Bonding Quiz
16. Which of the following compounds exhibits hydrogen bonding?
A. H₂O
B. CH₄
C. NaCl
D. CO₂
17. Molecules with polar bonds often have
A. Symmetrical shapes
B. Dipole moments
C. No charge separation
D. Metallic properties
18. The octet rule states that atoms tend to
A. Gain or lose electrons to have 8 valence electrons
B. Share 4 electrons
C. Always form ionic bonds
D. Only react with metals
19. The bond in O₂ is
A. Single covalent
B. Double covalent
C. Ionic
D. Metallic
20. The bond in N₂ is
A. Single covalent
B. Double covalent
C. Triple covalent
D. Ionic
Chemical Bonding Quiz ANSWERS AND EXPLANATIONS
1. A – Chemical bonds form by electron transfer (ionic) or sharing (covalent) to stabilize atoms and complete valence shells.
2. B – Ionic bonds form between metals (electron donors) and nonmetals (electron acceptors).
3. B – Covalent bonds involve the sharing of electrons between nonmetal atoms to achieve stability.
4. C – Metallic bonds are present in metals, where delocalized electrons hold positive ions together.
5. A – NaCl is ionic: Na⁺ transfers an electron to Cl⁻ forming a lattice structure.
6. B – H₂O is covalent; electrons are shared between oxygen and hydrogen atoms.
7. B – Sodium loses one electron to form Na⁺ in ionic bonding with chlorine.
8. A – Chlorine gains an electron from sodium to form Cl⁻ in NaCl.
9. B – Ionic solids conduct electricity when molten or in solution, and have high melting points.
10. B – Covalent compounds have low melting points and may be gases, liquids, or soft solids.
11. A – Metallic bonding allows free electrons to move, explaining metal conductivity.
12. B – Polar covalent bonds have unequal sharing, creating partial positive and negative ends.
13. A – Nonpolar covalent bonds share electrons equally, usually between identical atoms.
14. B – Covalent bonds are generally stronger than ionic or metallic bonds due to shared electron pairs.
15. C – Hydrogen bonding is an intermolecular force, not a true chemical bond.
16. A – Water exhibits hydrogen bonding due to polarity and H–O dipoles.
17. B – Polar molecules have dipole moments because of unequal electron distribution.
18. A – Octet rule: atoms gain, lose, or share electrons to achieve eight valence electrons.
19. B – O₂ has a double covalent bond; two pairs of electrons are shared between oxygens.
20. C – N₂ has a triple covalent bond with three shared electron pairs, making it very stable.
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