CAIE A Level Chemistry 9701 · Hydroxy compounds
A student is given three unlabelled bottles containing the isomeric alcohols butan-1-ol, butan-2-ol, and 2-methylpropan-2-ol. Describe chemical tests using acidified potassium dichromate(VI) that would allow the student to identify each alcohol. Explain the expected results, including the structures of any organic products formed.
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Explain means: Give the reasons or the mechanism: why or how something happens. Link each point to the next with because, so or which means. A list of facts with no links usually loses the reasoning marks.
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