Lesson 5.6.1.2

5.6.1.2 Factors which affect the rates of chemical reactions Quiz: AQA Combined Science, Unit 13

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 5.6.1.2, Factors which affect the rates of chemical reactions: 20 multiple choice questions for the AQA GCSE Combined Science (8464), Unit 13: The rate and extent of chemical change, written with Revision Ninja.

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The 20 questions

  1. Which factor affects the rate of chemical reactions?

    • Container colour
    • Product mass
    • Initial volume
    • Temperature

  2. Which change increases the surface area of a solid reactant?

    • Adding water
    • Compressing into a block
    • Cooling the solid
    • Crushing into powder

  3. Why does increasing gas pressure increase reaction rate?

    • Lower activation energy
    • More frequent collisions
    • Larger particle size
    • Faster individual molecules

  4. What is measured in Required practical 11 when using a gas method?

    • pH of solution
    • Temperature change
    • Volume of gas
    • Mass of catalyst

  5. What should Required practical 11 involve developing at the start?

    • A pie chart
    • A titration curve
    • A hypothesis
    • An electrical circuit

  6. Which of these is NOT a factor affecting reaction rate?

    • Catalyst presence
    • Reactant concentration
    • Colour of products
    • Gas pressure

  7. Which factor applies only to reacting gases?

    • Concentration of solutions
    • Presence of catalysts
    • Temperature
    • Pressure

  8. What does a turbidity change measure in a rate experiment?

    • Solution boiling point
    • Electrical conductivity
    • Gas pressure rise
    • Cloudiness appearance

  9. Why does a higher reactant concentration increase the reaction rate?

    • Faster moving particles
    • Lower activation energy
    • Larger surface area
    • More particles per volume

  10. A student doubles the surface area of a solid reactant, keeping everything else the same. The rate:

    • Increases
    • Is unchanged
    • Decreases
    • Doubles product mass

  11. What is measured in the disappearing cross practical experiment?

    • Gas volume produced
    • Temperature change
    • Mass loss
    • Cross visibility loss

  12. Why does powdered marble react faster with acid than marble chips?

    • Presence of catalyst
    • Higher concentration
    • Greater surface area
    • Higher temperature

  13. Which temperature produces the fastest rate of reaction?

    • 10 degrees C
    • 60 degrees C
    • 20 degrees C
    • 30 degrees C

  14. Pressure of a gas reaction in a closed container is doubled. Collision frequency:

    • Halves
    • Doubles in energy
    • Is unchanged
    • Roughly doubles

  15. Between two solutions, which runs faster?

    • Dilute solution
    • More concentrated solution
    • Frozen solution
    • Divergent solution

  16. What is the effect of raising temperature on reaction rate?

    • Stops reaction
    • Increases rate
    • No effect
    • Decreases rate

  17. Which factor for reactions in solution is listed in the spec?

    • Light intensity
    • Magnetic field
    • Gravity
    • Concentration

  18. Which factor does a solid reactant depend on for its rate?

    • Concentration
    • Pressure
    • Surface area
    • Volume

  19. What change speeds up a solid reacting with an acid?

    • Smaller particles
    • Larger lumps
    • Lower temperature
    • Lower pressure

  20. Which set of conditions produces the fastest reaction rate?

    • Dilute, powdered, hot
    • Concentrated, lumped, cold
    • Concentrated, powdered, hot
    • Dilute, lumped, cold

All AQA Combined Science quizzes