Lesson 3.3.10.1

3.3.10.1 Bonding Quiz: AQA Chemistry, Unit 3

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

In partnership with Revision Ninja

Lesson 3.3.10.1, Bonding: 20 multiple choice questions for the AQA Chemistry (7405), Unit 3: Organic chemistry, written with Revision Ninja.

Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.

Host this setFree Play

The 20 questions

  1. How do the C-C bond lengths in benzene compare to single and double bonds?

    • Equal to double
    • Equal to single
    • Longer than single
    • Intermediate between both

  2. Which atomic orbitals overlap sideways to form the delocalised ring in benzene?

    • d orbitals
    • sp2 orbitals
    • s orbitals
    • p orbitals

  3. Approximately what is the enthalpy of hydrogenation of cyclohexene?

    • -150 kJ mol-1
    • -120 kJ mol-1
    • -360 kJ mol-1
    • -208 kJ mol-1

  4. The theoretical enthalpy of hydrogenation of cyclohexa-1,3,5-triene is -360 kJ mol-1, and the measured value for benzene is -208 kJ mol-1. What is the extra stability of benzene?

    • 152 kJ mol-1
    • 88 kJ mol-1
    • 360 kJ mol-1
    • 208 kJ mol-1

  5. Which reaction type retains the stable delocalised pi system of benzene?

    • Addition
    • Substitution
    • Elimination
    • Oxidation

  6. What is the bond angle within the benzene ring?

    • 90 degrees
    • 109.5 degrees
    • 180 degrees
    • 120 degrees

  7. What causes benzene to be more stable than cyclohexa-1,3,5-triene?

    • Hyperconjugation
    • Steric hindrance
    • Ring strain
    • Electron delocalisation

  8. If each isolated C=C bond releases about 120 kJ mol-1 on hydrogenation, what is the predicted total for three C=C bonds?

    • -208 kJ mol-1
    • -120 kJ mol-1
    • -152 kJ mol-1
    • -360 kJ mol-1

  9. What is the hybridisation of each carbon atom in the benzene ring?

    • sp2
    • sp3d
    • sp3
    • sp

  10. Why are all carbon-carbon bond lengths identical in benzene?

    • Alternating double bonds
    • Equal electron delocalisation
    • Ring strain
    • Rapid tautomerism

  11. Why does benzene react much slower with bromine water than cyclohexene does?

    • Lack of hydrogen
    • Low electron density
    • High pi-system stability
    • Steric hindrance

  12. How many delocalised pi electrons are present in benzene?

    • 4
    • 2
    • 8
    • 6

  13. How many p electrons are contributed in total to benzene's delocalised pi system?

    • Four
    • Six
    • Twelve
    • Three

  14. What structure does cyclohexa-1,3,5-triene represent in benzene thermochemistry calculations?

    • Delocalised single bonds
    • Fully saturated ring
    • Ionic intermediate
    • Localised double bonds

  15. Where are delocalised electrons positioned within a molecule?

    • Between two atoms
    • In core shells
    • On one atom
    • Over multiple atoms

  16. What is the approximate C-C bond length in benzene?

    • 0.120 nm
    • 0.154 nm
    • 0.139 nm
    • 0.134 nm

  17. Which bond types form the planar framework and delocalised ring in benzene?

    • Pi only
    • Sigma and pi
    • Sigma only
    • Ionic and covalent

  18. How does the reactivity of benzene towards electrophiles compare with cyclohexene?

    • Much more reactive
    • Completely unreactive
    • Much less reactive
    • Identical reactivity

  19. What is the molecular geometry of a benzene ring?

    • Trigonal pyramidal
    • Non-planar chair
    • Planar hexagonal
    • Tetrahedral

  20. Which feature of Kekule's benzene model contradicts experimental evidence?

    • Alternating bond lengths
    • Carbon-hydrogen single bonds
    • Six carbon atoms
    • Planar geometry

All AQA Chemistry quizzes