Lesson 6E.1

6E.1 Alcohol classification, reactions and preparation Quiz: Pearson Edexcel Chemistry, Unit 6

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 6E.1, Alcohol classification, reactions and preparation: 20 multiple choice questions for the Pearson Edexcel Chemistry (9CH0), Unit 6: Organic Chemistry I, written with Revision Ninja.

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The 20 questions

  1. How many alkyl groups are attached to the C-OH carbon in a primary alcohol?

    • Zero
    • One
    • Two
    • Three

  2. Which product forms when a primary alcohol is oxidised by warm acidified potassium dichromate(VI) and the aldehyde is distilled off immediately?

    • An aldehyde
    • A carboxylic acid
    • A ketone
    • An alkene

  3. Which product forms when a secondary alcohol is oxidised by acidified potassium dichromate(VI)?

    • A ketone
    • A carboxylic acid
    • An ester
    • An aldehyde

  4. How many hydrogen atoms are bonded to the carbon carrying the -OH group in a tertiary alcohol?

    • Two
    • One
    • Three
    • Zero

  5. What is the product when ethanol is heated with phosphorus pentachloride, PCl5?

    • Chloroethane
    • Ethyl ethanoate
    • Ethanal
    • Ethene

  6. Which catalyst dehydrates an alcohol to form an alkene by an elimination reaction?

    • Acidified potassium dichromate
    • Aqueous sodium hydroxide
    • Dilute sulfuric acid
    • Concentrated phosphoric acid

  7. What is observed when an aldehyde is heated with Benedict's solution in a positive test?

    • Blue solution
    • Brick-red precipitate
    • Orange-to-green change
    • Silver mirror

  8. What is the primary purpose of heating an organic reaction mixture under reflux?

    • Increase product yield
    • Speed up filtration
    • Separate liquid products
    • Prevent reactant loss

  9. Which technique is used to separate a dissolved organic product from an aqueous layer in a separating funnel?

    • Electrolysis
    • Filtration through paper
    • Fractional crystallisation
    • Solvent extraction

  10. Which substance is commonly used as a drying agent for a liquid organic product?

    • Anhydrous magnesium sulfate
    • Aqueous sodium carbonate
    • Concentrated sulfuric acid
    • Hydrated copper sulfate

  11. Why is the boiling temperature of a liquid product measured during distillation?

    • To increase yield
    • To measure rate
    • To prevent oxidation
    • To test purity

  12. What mass of ethanoic acid (Mr = 60.0) is theoretically formed by complete oxidation of 0.100 mol of ethanol?

    • 6.00 g
    • 12.0 g
    • 4.60 g
    • 3.00 g

  13. What is the product of 2-methylpropan-2-ol with concentrated hydrochloric acid, the chlorination in core practical 6?

    • 2-methylpropan-1-ol
    • 2-methylpropene only
    • 1-chloro-2-methylpropane
    • 2-chloro-2-methylpropane

  14. What is the balanced equation for the partial oxidation of ethanol to ethanal, using [O] for the oxidising agent?

    • CH3CH2OH + [O] -> CH3CHO + H2O
    • CH3CH2OH + [O] -> CH3COOH
    • CH3CH2OH + [O] -> CH3CH2Cl + H2O
    • CH3CH2OH + [O] -> CH2=CH2 + H2O

  15. Which alcohol gives a ketone on oxidation?

    • Propan-2-ol
    • 2-methylpropan-2-ol
    • Propan-1-ol
    • Methanol

  16. Why is an aldehyde distilled off immediately during the oxidation of a primary alcohol?

    • Prevent dehydration
    • Remove water vapour
    • Prevent further oxidation
    • Increase reaction rate

  17. Which reagents generate hydrogen bromide in situ to convert ethanol into bromoethane?

    • PBr3 and NaOH
    • KBr and 50% H2SO4
    • NaBr and HCl
    • KBr and HNO3

  18. Which reagents prepare an iodoalkane directly from an alcohol?

    • Sodium iodide and acid
    • Potassium iodide and water
    • Hydrogen iodide and heat
    • Phosphorus and iodine

  19. What is the major organic product formed by the dehydration of butan-2-ol?

    • But-1-ene
    • But-2-ene
    • Butane
    • Butanal

  20. What change occurs to potassium dichromate(VI) when it acts as an oxidising agent?

    • It donates electrons
    • It gains protons
    • It accepts electrons
    • It loses oxygen

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