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Purity and separating mixtures

Purity and separating mixtures

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Question 21

A student investigates some solid samples using thin-layer chromatography (TLC). The student also measures the melting point of each sample. Which results should the student expect from a pure sample?

A

2 spots, melting point 135 ∘C135\ ^\circ\text{C}135 ∘C

B

1 spot, melting point 131–135 ∘C131\text{--}135\ ^\circ\text{C}131–135 ∘C

C

1 spot, melting point 135 ∘C135\ ^\circ\text{C}135 ∘C

D

3 spots, melting point 131–135 ∘C131\text{--}135\ ^\circ\text{C}131–135 ∘C

Markscheme

Purity and separating mixtures Questions

  1. GCSE
  2. /Chemistry
  3. /Purity and separating mixtures

46 exam-style questions on OCR GCSE Chemistry Purity and separating mixtures. Each one has a worked solution and a mark scheme showing where the marks go.

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