Lesson 3.3.3.1

3.3.3.1 Nucleophilic substitution Quiz: AQA Chemistry, Unit 3

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 3.3.3.1, Nucleophilic substitution: 20 multiple choice questions for the AQA Chemistry (7405), Unit 3: Organic chemistry, written with Revision Ninja.

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The 20 questions

  1. Why are halogenoalkanes more reactive than alkanes towards nucleophiles?

    • Presence of free radicals
    • Non-polar structure
    • Higher molecular mass
    • Polar C-X bond

  2. Which nucleophile is used to hydrolyse halogenoalkanes to alcohols?

    • OH-
    • H+
    • NO2+
    • Br2

  3. Which nucleophile produces a nitrile from a halogenoalkane?

    • H2O
    • NO3-
    • CN-
    • Cl2

  4. Which nucleophile reacts with a halogenoalkane to form an amine?

    • O2
    • NH3
    • Ar
    • CH4

  5. Which 1-haloalkane reacts fastest during nucleophilic substitution with hydroxide ions?

    • 1-bromobutane
    • 1-iodobutane
    • 1-fluorobutane
    • 1-chlorobutane

  6. What factor determines the increasing rate of halogenoalkane hydrolysis down Group 17?

    • Increasing electronegativity
    • Decreasing bond enthalpy
    • Decreasing molecular mass
    • Increasing bond polarity

  7. What precipitate forms when 1-chlorobutane undergoes hydrolysis in the presence of silver nitrate?

    • Brown precipitate
    • White precipitate
    • Yellow precipitate
    • Cream precipitate

  8. Which silver halide precipitate is yellow?

    • AgBr
    • AgCl
    • AgI
    • AgF

  9. Which halogenoalkane gives a cream precipitate in the silver nitrate test?

    • Bromoalkane
    • Iodoalkane
    • Chloroalkane
    • Fluoroalkane

  10. Which halogenoalkane is the least reactive in nucleophilic substitution?

    • 1-bromobutane
    • 1-iodobutane
    • 1-fluorobutane
    • 1-chlorobutane

  11. Which of these nucleophiles has a lone pair and is negatively charged?

    • OH-
    • H+
    • CH3+
    • BF3

  12. How many species are involved in the rate-determining step of an SN2 reaction?

    • Three
    • Zero
    • One
    • Two

  13. What is the product of the nucleophilic substitution of 1-bromopropane with aqueous OH-?

    • Propanal
    • Propene
    • Propane
    • Propan-1-ol

  14. What product is formed when bromoethane reacts with excess aqueous ammonia?

    • Ethylamine
    • Ethanol
    • Ethene
    • Ethanenitrile

  15. Which factor makes bromoalkanes more reactive in substitution than chloroalkanes?

    • Greater bond enthalpy
    • Lower bond enthalpy
    • Higher bond polarity
    • Smaller atomic radius

  16. Which halogenoalkane is the most polar carbon-halogen bond?

    • C-I
    • C-Br
    • C-F
    • C-H

  17. Why is the carbon atom in a carbon-halogen bond electron-deficient?

    • Carbon donates protons
    • Halogen is electronegative
    • Halogen donates electrons
    • Carbon is electronegative

  18. Which halogenoalkane is tertiary?

    • 2-chloro-2-methylpropane
    • 1-chloropropane
    • 2-chloropropane
    • Chloromethane

  19. Why does 1-iodobutane undergo hydrolysis faster than 1-chlorobutane?

    • Lower bond enthalpy
    • Higher bond enthalpy
    • Smaller atomic size
    • Greater bond polarity

  20. What observation indicates the relative rate of halogenoalkane hydrolysis with silver nitrate?

    • Precipitate formation rate
    • Colour change duration
    • pH change speed
    • Effervescence rate

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