O-LevelChemistryOrganic Chemistry5070/12 · May/June 2019 · Q31 Mark

The diagram represents a chromatogram of the colourless acids present in a drink. The chromatogram has been treated with a locating agent. A table of Rf values for the possible acids is given. Which acids are present in the drink?

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Acitric acid, malic acid and lactic acid

Bcitric acid, malic acid and succinic acid

Cmalic acid, lactic acid and succinic acid

Dtartaric acid, citric acid and malic acid

✓ Correct answer

B: citric acid, malic acid and succinic acid

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Topic: Organic Chemistry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2019 Paper 1 Variant 2, question 3.

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