Organic Chemistry: Alcohols (Edexcel International A Level Chemistry)

Exam Questions

9 mins7 questions
11 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

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21 mark

Which reagent would convert an alcohol into an alkene?

  • acidified potassium dichromate(VI)

  • anhydrous calcium sulfate

  •  concentrated phosphoric acid

  • ethanolic potassium hydroxide

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11 mark

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

  • CH3CH2OH

  • CH3CHOHCH3

  • CH3CH2CHO

  • CH3COCH3

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2a1 mark

Organic reactions can be classified in different ways.

a)
How should the reaction shown be classified?
q7a-paper-2-oct-2021-edexcel-ial-chemistry
  • addition

  • oxidation

  • polymerisation

  • substitution

2b1 mark
b)
How should the reaction shown be classified?
q7b-paper-2-oct-2021-edexcel-ial-chemistry
  • addition

  • oxidation

  • reduction

  • substitution

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3a1 mark

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

a)
What type of reaction occurs?
  • addition

  • elimination

  • hydrolysis

  • substitution

3b1 mark
b)

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

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4
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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

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5
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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

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