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Organic analysis

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Question 9

This question is about simple test-tube reactions to identify organic liquids.

a.

Silver nitrate solution can be used to distinguish between ethanoyl chloride and 2-chlorobutane.

Give the observations you would expect when a few drops of silver nitrate solution are added to separate samples of ethanoyl chloride and 2-chlorobutane at room temperature.

  • Observation with ethanoyl chloride:
  • Observation with 2-chlorobutane:
[2]
b.

Three unlabelled bottles are known to contain either propan-1-ol, propanal, or propanone.

A sample of each liquid is warmed with Fehling's solution.

  • Identify the liquid that reacts with Fehling's solution and give the expected observation.
  • Suggest a further simple test-tube reaction that can be used to distinguish between the remaining two liquids.
  • Give the expected observation with the liquid that reacts to this further test.
[4]
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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