A-LevelChemistryHydroxy compounds9701/12 · Oct/Nov 2019 · Q241 Mark

Propan-1-ol can be reacted with acidified potassium dichromate(VI) to form propanoic acid, reaction 1, or propanal, reaction 2. [Figure 24.1] How can the reaction be carried out to ensure that reaction 2 occurs rather than reaction 1?

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AAn excess of acidified potassium dichromate(VI) is used.

BAn excess of concentrated sulfuric acid is added.

CThe reaction mixture is distilled immediately after mixing.

DThe reaction mixture is heated under reflux.

✓ Correct answer

C: The reaction mixture is distilled immediately after mixing.

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Topic: Hydroxy compounds, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2019 Paper 1 Variant 2, question 24.

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