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8.1 Purity, formulations and chromatography

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Question 11
F

A chromatogram of substance X in one solvent showed a single spot.

Which conclusion about substance X is correct?

[1]
A

X is pure, because a pure substance always has an RfR_fRf​ value of 1

B

X may be pure, because a pure substance gives one spot in every solvent

C

X is a mixture, because one spot means the parts did not separate

D

X is pure, because one spot in one solvent shows it is one compound

Markscheme

8.1 Purity, formulations and chromatography Questions

  1. GCSE
  2. /Chemistry
  3. /8.1 Purity, formulations and chromatography

40 exam-style questions on AQA GCSE Chemistry 8.1 Purity, formulations and chromatography, covering 8.1.1 Pure substances, 8.1.2 Formulations, and 8.1.3 Chromatography. Each one has a worked solution and a mark scheme showing where the marks go.

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