Lesson 3.1.3.2

3.1.3.2 Nature of covalent and dative covalent bonds Quiz: AQA Chemistry, Unit 1

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 3.1.3.2, Nature of covalent and dative covalent bonds: 20 multiple choice questions for the AQA Chemistry (7405), Unit 1: Physical chemistry, written with Revision Ninja.

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The 20 questions

  1. What does a single covalent bond contain?

    • A transfer of one electron from one atom to another
    • A shared pair of electrons
    • A lattice of positive ions
    • Two electrons donated by one atom to nothing

  2. How is a co-ordinate (dative covalent) bond represented in a diagram?

    • A straight line between the two atoms, with one atom marked as the donor
    • A dotted line between the two atoms, showing that the bond is weaker than normal
    • An arrow pointing from the donor atom to the acceptor atom
    • A wavy line between the two atoms, showing that the bond is delocalised over both

  3. In a dative covalent bond, how many electrons are supplied by the donor atom?

    • Both electrons of the shared pair
    • None, because the acceptor supplies both
    • One electron
    • Half of a shared pair

  4. How many shared pairs of electrons are in a triple bond?

    • 3
    • 1
    • 4
    • 2

  5. Which molecule contains a double bond?

    • Methane, CH4 gas
    • Water, H2O liquid
    • Oxygen molecule, O2
    • Ammonia, NH3 gas

  6. Which species contains a co-ordinate bond?

    • CH4
    • NH3
    • H2
    • NH4+

  7. Which bond is formed when both electrons of a shared pair come from one atom?

    • Single covalent
    • Dative covalent
    • Ionic
    • Double covalent

  8. How many shared pairs of electrons are in a molecule of nitrogen, N2?

    • 3
    • 2
    • 6
    • 1

  9. In the formation of the ammonium ion, NH4+, which atom donates the electrons for the new bond?

    • The hydrogen atom donates both electrons
    • Each hydrogen donates one electron
    • The ion donates no electrons
    • The nitrogen atom donates both electrons

  10. In the compound BF3 + NH3 -> H3N-BF3, which atom is the acceptor of the electron pair?

    • Nitrogen
    • Boron
    • Fluorine
    • Hydrogen

  11. How many shared pairs of electrons are present in a molecule of carbon monoxide, CO?

    • 4
    • 6
    • 2
    • 3

  12. In the hydronium ion, H3O+, which statement describes the dative bond?

    • Two hydrogen atoms share an electron each with oxygen
    • Water donates a lone pair of electrons to H+
    • The O-H bond is ionic
    • H+ donates a pair of electrons to water

  13. Which species can act as an electron-pair donor in a co-ordinate bond?

    • A cation with no electrons
    • A noble gas atom with two bonds
    • A metal atom with delocalised electrons
    • A molecule with a lone pair of electrons

  14. How many shared pairs of electrons are in one molecule of ethene, C2H4?

    • 4
    • 5
    • 6
    • 8

  15. How many shared pairs of electrons are in one molecule of hydrogen cyanide, HCN?

    • 2
    • 3
    • 6
    • 4

  16. Which statement explains why BF3 accepts a lone pair from NH3?

    • Boron has an incomplete octet and can accept an electron pair
    • Boron has a full octet and wants to share extra electrons with nitrogen atoms
    • Hydrogen accepts a pair from nitrogen, which then becomes a stable ammonium ion
    • Fluorine donates electrons to boron, which then completes its outer shell with them

  17. How many electrons does the N-H dative bond in NH4+ contain?

    • 4
    • 3
    • 1
    • 2

  18. How does a covalent bond differ from a dative covalent bond in terms of where the electrons come from?

    • A covalent bond has both electrons from one atom, while a dative bond has one from each
    • Both have electrons from each atom equally
    • A dative bond has no shared electrons
    • A covalent bond has one electron from each atom, while a dative bond has both electrons from one atom

  19. How many shared pairs of electrons are in one molecule of ethanol, C2H5OH?

    • 7
    • 9
    • 8
    • 10

  20. Which statement about a double bond is correct?

    • A double bond is always weaker than a single bond
    • A double bond contains two shared pairs of electrons
    • A double bond contains three shared pairs of electrons
    • A double bond contains one shared pair and one lone pair

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