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CAIE A-Level Chemistry 16.1 Alcohols Question Bank

Practise classifying and reacting alcohols, using oxidation, reduction, iodoform evidence and O-H acidity to identify products.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • distinguish primary, secondary and tertiary alcohols from oxidation products or no oxidation
  • apply alkaline I2(aq) evidence to identify CH3CH(OH)- groups from a yellow precipitate
  • write alcohol reaction equations with sodium or reduction products using [H] where required

Covered syllabus points

16.1.1—Preparation of alcohols16.1.2—Describe16.1.3—Classify alcohols as primary, secondary16.1.4—CH3CH(OH)- alcohol identification16.1.5—Acidity of alcohols compared with water

16.1 Alcohols question 1

[Maximum number: 1]

Allyl chloride is an important chemical used in the manufacture of plastics, pharmaceuticals and pesticides.

allyl chloride

allyl chloride

A series of reactions starting from allyl chloride is shown.

Figure for Question 16.1 Alcohols question 1 — CAIE A-Level Chemistry AS

Suggest a reagent that can be used in reaction 1.

16.1 Alcohols question 2

[Maximum number: 2]

Fig. 4.1 shows how propane, C3H8\mathrm{C}_{3} \mathrm{H}_{8}, can be converted to propanoic acid, CH3CH2COOH\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}.

Fig. 4.1

Fig. 4.1

Question (a)

(a)

Reaction 3 takes place when CH3CH2CH2OH\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH} is heated under reflux with acidified potassium dichromate(VI) solution.

[ 2 ]

Question (i)

(i)

State the colour change that takes place in the reaction mixture.

[ 1 ]

Question (ii)

(ii)

Construct an equation to represent reaction 3. Use [O] to represent an atom of oxygen from the oxidising agent.

[ 1 ]
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