CAIE A Level Chemistry 9701 · Hydroxy compounds
A student has three unlabelled bottles containing the isomeric alcohols butan-1-ol, butan-2-ol and 2-methylpropan-2-ol.
(a) Describe the products formed when each alcohol is heated under reflux with acidified potassium dichromate(VI). State the observations that would be made in each case.
(b) Describe the reaction of each alcohol with phosphorus pentachloride, . State the type of organic product formed and any observable change.
7 marks, so the mark scheme is looking for about 7 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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