O-LevelChemistryOrganic Chemistry5070/12 · Oct/Nov 2020 · Q371 Mark

A sample of aqueous glucose is fermented with yeast at 37 °C in the absence of air. The main organic product, X, is purified by fractional distillation. X is then oxidised, by heating under reflux with acidified potassium manganate(VII), to give a final product Y. What is the identity of Y?

Aethanoic acid

Bethene

Cpropanoic acid

Dpropene

✓ Correct answer

A: ethanoic acid

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Topic: Organic Chemistry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2020 Paper 1 Variant 2, question 37.

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