IGCSEScienceCambridge (CIE)Co-ordinated Sciences (Double Award)ChemistryExam Questions6. Chemical ReactionsChemical Change & Rate of Reaction

Chemical Change & Rate of Reaction (Cambridge (CIE) IGCSE Co-ordinated Sciences (Double Award): Chemistry): Exam Questions

Exam code: 0654 & 0973

9 hours68 questions

Select a download format for Chemical Change & Rate of Reaction

Scroll for more

Select an answer set to view for
Chemical Change & Rate of Reaction

Easy
Medium
Hard
1
Sme Calculator
1 mark

The rate of a reaction was monitored by recording the volume of gas produced every 5 seconds.

TIUbhf1t_q1

What is the mean rate of reaction in the first 10 seconds of the reaction, in cm3/s?

  • 2.9

  • 3.0

  • 3.5

  • 2.5

Choose your answer

2
1 mark

Which of the following processes represents a physical change?

  • Acid base neutralisation

  • Metal displacement reactions

  • Boiling ethanol

  • Combustion of magnesium

Choose your answer

3
1 mark

Physical and chemical changes are different processes. Which of the following rows correctly identifies characteristics of each one?

 

chemical change

physical change

A

no new substance formed

change of state

B

no new substance formed

involves electron transfer

C

new substance formed

involves electron transfer

D

new substance formed

change of state

    Choose your answer

    4
    1 mark

    A student was measuring the rate of reaction using the apparatus in the diagram.

    ms3-6-1-easy-cie-igcse-chemistry

    What reaction is the student studying?

    • CaO + H2SO4 → CaSO4 + H2O

    • Mg(OH)2 + 2HCl → MgCl2 + 2H2O

    • Fe + H2SO4 → FeSO4 + H2

    • KCl + AgNO3 → KNO3 + AgCl

    Choose your answer

    5
    1 mark

    A student was investigating the rate of reaction between iron and a solution of sulfuric acid. Two experiments were performed, P and Q, in which the volume of hydrogen was recorded at regular intervals.

    q5-6-1-easy-cie-igcse-chemistry

    Which change could explain the difference in results between P and Q?

    • The student added a catalyst in P.

    • Larger pieces of iron were used in P.

    • Less concentrated acid was used in P.

    • Larger quantities of both reactants are used P.

    Choose your answer

    1
    1 mark

    A student was investigating the rate of reaction between a solid base and a solution of sulfuric acid. Two experiments were performed, S and T, in which the mass of the reaction flask was recorded as shown in the graph.

    f4nlb5-v-q1-6-1-medium-cie-igcse-chemistry

    Which of the following changes could explain the difference in results between S and T?

    • The sulfuric acid is less concentrated in T.

    • The sulfuric acid is more concentrated in T.

    • A higher temperature is used in S.

    • Larger sized particles are used in T.

    Choose your answer

    2
    1 mark

    Which graph correctly shows the effect of increasing the temperature on the rate of reaction between magnesium and sulfuric acid in which neither reactant runs out?

    q2-6-1-medium-cie-igcse-chemistry

      Choose your answer

      3
      1 mark

      A student reacts a metal carbonate with nitric acid and measures the volume of carbon dioxide gas released at regular intervals. The results of the experiment are shown in the graph.

      q3-6-1-medium-cie-igcse-chemistry

      Between which two measurements was the reaction the fastest?

      • 0 and 2 minutes

      • 2 and 4 minutes

      • 4 and 6 minutes

      • 10 and 12 minutes

      Choose your answer

      4
      1 mark

      Magnesium metal reacts with an excess of hydrochloric acid solution to form magnesium chloride and hydrogen:

      Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g)

      Which of the following will not increase the rate of this reaction?

      • Increase the temperature of the acid

      • Increase the surface area to volume ratio of the pieces of magnesium

      • Increase the concentration of the hydrochloric acid

      • Increase the volume of hydrochloric acid solution used

      Choose your answer

      5
      1 mark

      Catalysts are often used in chemical reactions.

      Which letter represents two correct features of catalysts?

       

      Feature 1

      Feature 2

      A

      Lower activation energy for the reaction

      More products made in total

      B

      Alternative pathway for the reaction is provided

      Not used up over the course of the reaction

      C

      Makes industrial processes cheaper

      Metal catalysts are cheap to buy

      D

      Reduce the overall energy change of the reaction

      Can be present in biological systems as enzymes

        Choose your answer

        1
        1 mark

        A student was investigating the rate of reaction between acid and metals. The experimental set-up is shown below.

        q1-6-1-hard-cie-igcse-chemistry

        Which test tube would give the quickest reaction?

          Choose your answer

          2
          1 mark

          The graph shows the results of two separate reaction rate investigations using excess calcium carbonate and sulfuric acid.

          t5dT2jWN_q2-6-1-hard-cie-igcse-chemistry

          Which statement explains the difference between the results?

          • The temperature was higher in experiment 2.

          • Experiment 2 was allowed more time to react.

          • Same volume of a more concentrated acid was used in experiment 2.

          • More calcium carbonate was used in experiment 2.

          Choose your answer

          3
          1 mark

          Extended tier only

          Which of the following statements explains how increasing temperature increases the rate of a reaction?

          • Increasing the temperature increases the kinetic energy of the particles so there are a smaller number of successful collisions.

          • Increasing the temperature increases the kinetic energy of the particles so there are a larger number of unsuccessful collisions.

          • Increasing the temperature decreases the kinetic energy of the particles so there are a larger number of successful collisions.

          • Increasing the temperature increases the kinetic energy of the particles so there are a larger number of successful collisions.

          Choose your answer

          4
          1 mark

          Extended tier only

          Which of the following statements best describes the activation energy of a reaction?

          • The minimum energy released when colliding particles react.

          • The minimum energy required for particles to react when they collide.

          • The maximum energy required for particles to react when they collide.

          • The maximum energy released when colliding particles react.

          Choose your answer

          5
          1 mark

          Extended tier only

          Which of the following statements correctly describes the effects of increasing concentration on the rate of a reaction?

          • Increasing the concentration increases the rate of reaction as there are more successful collisions between particles per unit time.

          • Increasing the concentration increases the rate of reaction as there is more space between particles.

          • Increasing the concentration increases the rate of reaction as there are more collisions between particles per unit time.

          • Increasing the concentration increases the rate of reaction as there are more collisions between particles at the beginning of the reaction.

          Choose your answer