A-LevelChemistryHydroxy compounds9701/12 · Oct/Nov 2022 · Q331 Mark

1.0 mol of an organic compound, J, requires 6.0 mol of oxygen for complete combustion. 1.0 mol of J reacts with sodium, producing 0.50 mol of a gas that gives a 'pop' with a lighted splint. J reacts with an excess of hot acidified potassium manganate(VII) to produce an organic compound which gives an orange-red precipitate with 2,4-DNPH reagent. Which compound is J?

Abut-1-ene

Bbutan-2-ol

Cpropan-2-ol

D2-methylpropan-2-ol

✓ Correct answer

B: butan-2-ol

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Topic: Hydroxy compounds, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2022 Paper 1 Variant 2, question 33.

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