Lesson 4.1.1.2

4.1.1.2 Mixtures Quiz: AQA Chemistry, Unit 1

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.1.1.2, Mixtures: 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 1: Atomic structure and the periodic table, written with Revision Ninja.

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The 20 questions

  1. What defines the substances making up a mixture?

    • Identical properties
    • Same element type
    • Fixed mass ratio
    • Not chemically combined

  2. Which process separates a mixture by physical means only?

    • Combustion
    • Electrolysis
    • Filtration
    • Thermal decomposition

  3. Which technique separates a dissolved solid by evaporating the solvent and collecting crystals?

    • Chromatography
    • Crystallisation
    • Filtration
    • Fractional distillation

  4. Which technique separates a dissolved solid from its solvent?

    • Filtration
    • Simple distillation
    • Fractional distillation
    • Chromatography

  5. Which process separates crude oil into useful fractions?

    • Simple distillation
    • Fractional distillation
    • Crystallisation
    • Filtration

  6. In paper chromatography, what causes a spot to travel higher?

    • Higher solubility
    • Larger mass
    • Lower density
    • Darker colour

  7. Which process is classified as a physical change?

    • Electrolysis of water
    • Thermal decomposition of limestone
    • Burning magnesium ribbon
    • Mixing salt and sand

  8. What happens to the chemical properties of substances in a mixture?

    • They merge together
    • They remain unchanged
    • They reverse completely
    • They become neutral

  9. Sand and salt are mixed, then water is added. Which method first removes the sand?

    • Fractional distillation
    • Electrolysis
    • Chromatography
    • Filtration

  10. Which method is best to obtain pure water from seawater?

    • Chromatography
    • Simple distillation
    • Crystallisation
    • Filtration

  11. A student needs to separate black ink into its coloured dyes. Which method is most appropriate?

    • Simple distillation
    • Filtration
    • Chromatography
    • Crystallisation

  12. Which separation method relies on differing boiling points of liquids?

    • Crystallisation
    • Chromatography
    • Fractional distillation
    • Filtration

  13. Which property determines how dyes separate during paper chromatography?

    • Melting point
    • Solubility
    • Electrical charge
    • Density

  14. A mixture is heated, and the vapour is condensed back into liquid. What is this process called?

    • Chromatography
    • Distillation
    • Filtration
    • Crystallisation

  15. Which observation indicates a mixture rather than a chemical compound?

    • Energy release
    • Chemical bonding
    • Fixed proportions
    • Physical separation

  16. Which set contains only physical separation processes?

    • Filtration, crystallisation, chromatography
    • Combustion, crystallisation, filtration
    • Neutralisation, distillation, chromatography
    • Electrolysis, filtration, distillation

  17. Two liquids boil at 78 C and 98 C. Which method gives the best separation?

    • Crystallisation
    • Simple distillation
    • Fractional distillation
    • Filtration

  18. What term describes a mixture that is uniform throughout?

    • Suspension
    • Element
    • Compound
    • Solution

  19. How do the proportions of components vary in a mixture?

    • They can vary
    • Always fixed ratios
    • Equal mass only
    • Stricter than compounds

  20. Why does simple distillation fail to separate liquids with similar boiling points?

    • Insoluble in water
    • Form chemical bonds
    • Both vaporise together
    • Different densities

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