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CAIE A-Level Biology 2.1.3 Emulsion Test for Lipids Question Bank

Practise lipid-emulsion-test questions by mixing samples with ethanol, adding the extract to water and recognising cloudy or milky white emulsions.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • mix the sample with ethanol first so lipid or triglyceride dissolves in the organic solvent
  • add the ethanol extract to water in the correct order without heating or extra reagents
  • identify a cloudy, milky or opaque white emulsion as a positive lipid result

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