Lesson 4.2.1.4

4.2.1.4 Covalent bonding Quiz: AQA Chemistry, Unit 2

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.2.1.4, Covalent bonding: 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 2: Bonding, structure, and the properties of matter, written with Revision Ninja.

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The 20 questions

  1. When atoms share pairs of electrons, what type of bond is formed?

    • Covalent
    • Ionic
    • Noble gas
    • Metallic

  2. What type of strength describes covalent bonds between atoms?

    • Strong
    • Moderate
    • Weak
    • Variable

  3. Which substances may consist of small molecules?

    • Metallic elements
    • Ionic compounds
    • Alloys
    • Covalently bonded substances

  4. Which of these is a common small molecule?

    • Water
    • Sodium chloride
    • Iron
    • Diamond

  5. Which covalent substance is a giant covalent structure?

    • Methane
    • Carbon dioxide
    • Hydrogen
    • Diamond

  6. Which substance is a giant covalent structure given in the specification?

    • Nitrogen
    • Ammonia
    • Oxygen
    • Silicon dioxide

  7. Polymers are described as having:

    • Giant ionic lattices
    • Small molecules only
    • Very large molecules
    • Delocalised electrons

  8. In a polymer chemical formula, what does the letter n represent?

    • A negative charge
    • A large number
    • A neutral atom
    • The atomic number

  9. Which representation is suitable for showing the covalent bonds in a methane molecule?

    • Dot and cross
    • Delocalised sea
    • Macromolecular grid
    • Ionic lattice

  10. How many shared electron pairs are in a molecule of hydrogen?

    • 4
    • 0
    • 1
    • 2

  11. How many shared electron pairs are in a molecule of oxygen?

    • 2
    • 0
    • 1
    • 3

  12. How many shared electron pairs are in a molecule of nitrogen?

    • 1
    • 2
    • 3
    • 4

  13. How many shared electron pairs are in a molecule of methane?

    • 3
    • 1
    • 4
    • 2

  14. How many shared electron pairs are in a molecule of water?

    • 2
    • 1
    • 4
    • 3

  15. How many shared electron pairs are in a molecule of ammonia?

    • 4
    • 3
    • 2
    • 1

  16. What is the molecular formula of a molecule with 2 carbon and 4 hydrogen atoms?

    • C2H4
    • C2H2
    • CH2
    • C2H6

  17. What is the molecular formula of hydrogen chloride?

    • HCl2
    • H2Cl
    • H2Cl2
    • HCl

  18. What is a major limitation of using ball and stick models for molecules?

    • Incorrect formulas
    • No bonds shown
    • Wrong elements used
    • Misleading atom sizes

  19. Which representation shows a single covalent bond as a line?

    • Metallic lattice
    • Structural formula
    • Word equation
    • Ionic lattice

  20. What information does a molecular formula provide?

    • Number of atoms
    • Overall mass
    • Bond angles
    • Physical state

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