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8.1 Purity, formulations and chromatography

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Question 26

Every particle in a sealed flask is a water molecule. Each water molecule contains hydrogen and oxygen atoms.

Which statement gives the chemical reason why the sample is pure?

[1]
A

The hydrogen and oxygen count as two separate pure substances.

B

All the atoms in the flask have the same number of protons.

C

All the particles belong to one compound and no other substance is present.

D

No extra ingredient was added when the flask was filled.

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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