CAIE IGCSE Chemistry - Car Exhausts and Redox Reactions
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Questions and Answers

What is the purpose of chromatography?

  • To separate substances in a solvent with different solubilities (correct)
  • To separate dissolved solids from a solution
  • To separate a mixture of gases in a fractional column
  • To separate miscible liquids

    • In which method do substances rise in different fractions due to their different boiling points?

  • Chromatography
  • Distillation (correct)
  • Crystallisation
  • Filtration

    • What is the main objective of crystallisation?

  • To separate miscible liquids
  • To separate a mixture of gases in a fractional column
  • To separate substances in a solvent with different solubilities
  • To separate dissolved solid from a solution (correct)

    • How are substances separated in distillation?

    <p>By rising in different fractions due to their different boiling points</p> Signup and view all the answers

    What happens when a drop of solution is placed on a slide to check for crystal formation?

    <p>Crystal formation is observed</p> Signup and view all the answers

    Which method involves placing the paper in a beaker with solvent and allowing the solvent to travel up the paper?

    <p>Chromatography</p> Signup and view all the answers

    What characteristic allows substances to be separated in chromatography?

    <p>Different solubilities in the solvent</p> Signup and view all the answers

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