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Organic analysis

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Question 3

A reaction mixture contains a suspected carboxylic acid contaminated with an excess of phenol. Which of the following reagents is the most suitable to confirm the presence of the carboxylic acid group by a visible test-tube reaction?

A

NaOH(aq)\text{NaOH(aq)}NaOH(aq)

B

NaHCO3(aq)\text{NaHCO}_3\text{(aq)}NaHCO3​(aq)

C

Br2(aq)\text{Br}_2\text{(aq)}Br2​(aq)

D

Acidified K2Cr2O7(aq)\text{K}_2\text{Cr}_2\text{O}_7\text{(aq)}K2​Cr2​O7​(aq)

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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