A-LevelChemistryHydroxy compounds9701/12 · May/June 2020 · Q241 Mark

Which reagent could be used to distinguish between propane-1,2-diol and ethane-1,2-diol?

Aalkaline aqueous iodine

Baqueous acidified dichromate(VI)

Cethanol and a few drops of concentrated sulfuric acid

Dsodium metal

✓ Correct answer

A: alkaline aqueous iodine

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Topic: Hydroxy compounds, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2020 Paper 1 Variant 2, question 24.

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