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3.2 Methods of separating and purifying substances

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Question 19
F

Why does seawater require distillation rather than ordinary filtration to make pure water?

[1]
A

Filtration removes the salt but not the microorganisms

B

Dissolved salt passes through filter paper

C

Seawater is too dense to pass through filter paper

D

Chlorine cannot be added to seawater

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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