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8.1 Purity, formulations and chromatography

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Question 1
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Which sample is a pure substance in the chemical sense?

[1]
A

Sea water that contains several dissolved salts

B

Air that contains nitrogen, oxygen and argon

C

Copper wire that contains only copper atoms

D

Steel that contains iron atoms and carbon atoms

Markscheme

8.1 Purity, formulations and chromatography Questions

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

113 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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