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Organic analysis

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12
Question 1

Test-tube reactions can be used to identify the functional groups in organic molecules.

You are provided with samples of each of the following four compounds:

  • W: HO−CH2−CH2−COOH\text{HO}-\text{CH}_2-\text{CH}_2-\text{COOH}HO−CH2​−CH2​−COOH
  • X: Cl−CH2−CH2−CH2OH\text{Cl}-\text{CH}_2-\text{CH}_2-\text{CH}_2\text{OH}Cl−CH2​−CH2​−CH2​OH
  • Y: CH3−CH2−COOH\text{CH}_3-\text{CH}_2-\text{COOH}CH3​−CH2​−COOH
  • Z: Cl−CH2−CH2−CHO\text{Cl}-\text{CH}_2-\text{CH}_2-\text{CHO}Cl−CH2​−CH2​−CHO

Describe how you could distinguish between all four compounds using the minimum number of tests on each compound.

You should describe what would be observed in each test.

[6]
Markscheme

Organic analysis Questions

  1. A Level
  2. /Chemistry
  3. /Organic analysis

21 exam-style questions on AQA A Level Chemistry Organic analysis, covering Identification of functional groups by test-tube reactions, Mass spectrometry, and Infrared spectroscopy. Each one has a worked solution and a mark scheme showing where the marks go.

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