Skip to content

Course home

Sign up

8.1 Purity, formulations and chromatography

EasyMediumHard
1234567891011121314151617181920212223242526
Question 5
F

Two solids, P and Q, were heated at a steady rate until they had melted.

Figure shows how the temperature of each solid changed with time.

Figure: Graphs of temperature against time for two solids, P and Q, each heated at a steady rate until it had melted

image

a.

Use Figure.

Give the letter of the solid that is a pure substance.

Give a reason for your answer.

[2]
b.

Use Figure.

Determine the melting point of solid P.

[1]
c.

The label on solid Q says 'pure'.

Suggest what the word 'pure' means on this label.

[1]
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.

Question bank