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3.2 Methods of separating and purifying substances

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Question 11
F

A pure compound has a known melting point of 110 ∘C110\,^\circ\mathrm{C}110∘C. A sample melts at 103–108 ∘C108\,^\circ\mathrm{C}108∘C. What does this suggest?

[1]
A

The sample contains impurities

B

The sample is a different pure compound

C

The compound has decomposed completely

D

The sample is pure

Markscheme

3.2 Methods of separating and purifying substances Questions

  1. GCSE
  2. /Chemistry
  3. /3.2 Methods of separating and purifying substances

48 exam-style questions on Edexcel GCSE Chemistry 3.2 Methods of separating and purifying substances, covering 3.2.1 Pure substances and mixtures, 3.2.2 Techniques for separating mixtures, 3.2.3 Paper chromatography and Rf values, and 3.2.4 Making water potable. Each one has a worked solution and a mark scheme showing where the marks go.

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