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3.2 Methods of separating and purifying substances

3.2 Methods of separating and purifying substances

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Question 13

Water collected from a reservoir must be treated before it is safe to drink.

Three stages in this treatment process are chlorination, filtration, and sedimentation.

Which row in the table shows the correct order in which these three processes are carried out?

OptionFirst processSecond processThird process
Afiltrationchlorinationsedimentation
Bsedimentationfiltrationchlorination
Cchlorinationsedimentationfiltration
Dsedimentationchlorinationfiltration
A

First: filtration; Second: chlorination; Third: sedimentation

B

First: sedimentation; Second: filtration; Third: chlorination

C

First: chlorination; Second: sedimentation; Third: filtration

D

First: sedimentation; Second: chlorination; Third: filtration

Markscheme

3.2 Methods of separating and purifying substances Questions

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

107 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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