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CAIE IGCSE Chemistry Sedimentation Filtration Carbon and Chlorination

Practise ordering domestic water-treatment stages and matching sedimentation, filtration, activated carbon and chlorination to the impurity removed.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • use sedimentation and filtration to remove suspended insoluble solid particles
  • use activated carbon to remove unwanted tastes, odours and some dissolved substances
  • use chlorination to kill harmful microbes rather than to remove dissolved salts

10.1.7—Treatment of the domestic water supply question 1

[Maximum number: 2]

Filtration and chlorination are two stages in water treatment.
State the purpose of each stage.
filtration
chlorination

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