International A Level (IAL)ChemistryEdexcelExam Questions2. Energetics, Group Chemistry, Halogenoalkanes & AlcoholsOrganic Chemistry: Alcohols

Organic Chemistry: Alcohols (Edexcel International A Level (IAL) Chemistry): Multiple Choice Questions

Exam code: YCH11

29 mins18 questions

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Organic Chemistry: Alcohols

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1
1 mark

Which of these compounds is a tertiary alcohol?

  • 2-methylpropan-2-ol

  • 3-methylbutan-2-ol

  • 2,2-dimethylpropan-1-ol

  • 3,3-dimethylbutan-2-ol

Choose your answer

2
1 mark

Which reagent would convert an alcohol into an alkene?

  • acidified potassium dichromate(VI)

  • anhydrous calcium sulfate

  •  concentrated phosphoric acid

  • ethanolic potassium hydroxide

Choose your answer

3
1 mark

A primary alcohol is heated under reflux with acidified potassium dichromate(VI).

What is the organic product?

  • An aldehyde

  • A carboxylic acid

  • An ester

  • A ketone

Choose your answer

4a
1 mark

Organic reactions can be classified in different ways.

How should the reaction shown be classified?

q7a-paper-2-oct-2021-edexcel-ial-chemistry

  • addition

  • oxidation

  • polymerisation

  • substitution

Choose your answer

4b
1 mark

How should the reaction shown be classified?

q7b-paper-2-oct-2021-edexcel-ial-chemistry

  • addition

  • oxidation

  • reduction

  • substitution

Choose your answer

5
1 mark

Which reagents convert propan-1-ol into 1-bromopropane?

  • bromine and concentrated sulfuric acid

  • potassium bromide and 50% concentrated sulfuric acid

  • potassium bromide in ethanol

  • red phosphorus and iodine

Choose your answer

1
1 mark

Which of these compounds does not react with acidified potassium dichromate(VI)?

  • CH3CH2OH

  • CH3CHOHCH3

  • CH3CH2CHO

  • CH3COCH3

Choose your answer

2a
1 mark

Some alcohols react with concentrated phosphoric(V) acid, H3PO4 , to form alkenes.

What type of reaction occurs?

  • addition

  • elimination

  • hydrolysis

  • substitution

Choose your answer

2b
1 mark

The structure of 2-methylpentan-3-ol is shown.

q14b-paper-2-jan-2021-edexcel-ial-chemistry

This alcohol reacts with concentrated phosphoric(V) acid.
How many different alkenes can form?

  • one

  • two

  • three

  • four

Choose your answer

3
1 mark

What is the minimum volume of oxygen gas, measured at room temperature and pressure, required for the complete combustion of 9.2 g of C3H8O3 (Mr = 92)?

[Molar volume of gas at room temperature and pressure = 24.0 dm3 mol−1]

  • 4.8 dm3

  • 8.4 dm3

  • 12.0 dm3

  • 16.8 dm3

Choose your answer

4
1 mark

The oxidation of propan-1-ol by acidified potassium dichromate(VI) forms propanoic acid with a yield of 36% by mass.

What mass of propan-1-ol is needed to form 37.0 g of propanoic acid in this reaction?

[Mr of propanoic acid = 74     Mr of propan-1-ol = 60]

  • 10.8 g

  • 36.0 g

  • 40.8 g

  • 83.3 g

Choose your answer

5
1 mark

7.40 g of butan-1-ol is warmed with acidified potassium dichromate(VI). The organic product is distilled off as it forms.

4.68 g of the organic product is collected. Assume that butan-1-ol is the limiting reagent.

What is the percentage yield?

[Ar values: H = 1.0, C = 12.0, O = 16.0]

  • 53.2%

  • 63.2%

  • 65.0%

  • 83.6%

Choose your answer

6
1 mark

Butane-1,4-diol, HOCH2CH2CH2CH2OH, is heated under reflux with excess acidified potassium dichromate(VI).

Which equation represents the reaction?

  • HOCH2CH2CH2CH2OH + 2[O] → OHCCH2CH2CHO + 2H2O

  • HOCH2CH2CH2CH2OH + 2[O] → HOOCCH2CH2COOH + 2H2

  • HOCH2CH2CH2CH2OH + 3[O] → HOOCCH2CH2CHO + 2H2O

  • HOCH2CH2CH2CH2OH + 4[O] → HOOCCH2CH2COOH + 2H2O

Choose your answer

7
1 mark

Which alcohol forms a pair of E/Z isomers when heated with concentrated phosphoric acid?

  • 2-methylbutan-2-ol

  • propan-2-ol

  • pentan-3-ol

  • 3-methylbutan-2-ol

Choose your answer

1
1 mark

Which alcohol with the molecular formula C6H14O can be oxidised to a ketone and forms a mixture of three isomeric alkenes when heated with concentrated phosphoric acid?

Include any E and Z isomers in the count of alkenes.

  • hexan-3-ol

  • hexan-2-ol

  • 3-methylpentan-3-ol

  • 2-methylpentan-1-ol

Choose your answer

2
1 mark

How many structural isomers of each type of alcohol have the molecular formula C5H12O?

Primary

Secondary

Tertiary

A

3

3

2

B

4

2

2

C

4

3

1

D

5

2

1

    Choose your answer

    3
    1 mark

    Which sequence of reagents and conditions converts propan-1-ol, CH3CH2CH2OH, into 2-bromopropane, CH3CHBrCH3?

    • potassium bromide and 50% concentrated sulfuric acid

    • concentrated phosphoric acid and heat, then bromine

    • concentrated phosphoric acid and heat, then hydrogen bromide

    • potassium hydroxide in ethanol, then hydrogen bromide

    Choose your answer

    4
    1 mark

    The complete combustion of 10.0 cm3 of the vapour of an alcohol requires exactly 45.0 cm3 of oxygen. Both volumes are measured at the same temperature and pressure.

    The alcohol is oxidised to a ketone by acidified potassium dichromate(VI).

    Which alcohol is it?

    • propan-2-ol

    • propan-1-ol

    • butan-2-ol

    • 2-methylpropan-2-ol

    Choose your answer

    5
    1 mark

    0.880 g of an alcohol reacts completely with excess phosphorus(V) chloride, PCl5. 240 cm3 of hydrogen chloride gas is produced, measured at room temperature and pressure.

    A second sample of the alcohol is heated under reflux with acidified potassium dichromate(VI). The organic product is separated from the reaction mixture. It effervesces when sodium hydrogencarbonate is added.

    Which alcohol could it be?

    [Ar values: H = 1.0, C = 12.0, O = 16.0. Molar volume of a gas at room temperature and pressure = 24.0 dm3 mol−1]

    • butan-1-ol

    • pentan-2-ol

    • 2-methylbutan-2-ol

    • pentan-1-ol

    Choose your answer