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N5 Chemistry - Rates of Reaction

Quiz by Isabel McCluskey

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8 questions
Show answers
  • Q1
    Which of the following changes will speed up a chemical reaction?
    Decreasing concentration
    Adding a catalyst
    Increasing particle size
    Decreasing temperature
    30s
  • Q2
    Which of the following changes will not speed up a chemical reaction?
    Increasing particle size
    Increasing concentration
    Increasing temperature
    Adding a catalyst
    30s
  • Q3
    What would be the average rate of reaction, in cm3/s, over the first 20s of a chemical reaction if 10cm3 of gas is released in this time?
    2
    20
    0.5
    10
    30s
  • Q4
    Magnesium was added to hydrochloric acid, and 20cm3 of hydrogen had been released after 10s. After 50s, a total of 80cm3 of hydrogen had been released. What was the average rate of reaction, in cm3/s, between 10 and 50s?
    0.5
    0.66
    1.5
    1.4
    30s
  • Q5
    The graph shows the change on volume of a gas released in a chemical reaction over a period of time. What was the time, in seconds, at which the reacton stopped? (Image from https://www.sqa.org.uk/files_ccc/ChemistrySQPRN5.pdf)
    Question Image
    100
    65
    120
    90
    30s
  • Q6
    The graph shows the change on volume of a gas released in a chemical reaction over a period of time. What was the total volume of gas released in the reaction? (Image from https://www.sqa.org.uk/files_ccc/ChemistrySQPRN5.pdf)
    Question Image
    120
    90
    100
    65
    30s
  • Q7
    The graph shows the change on volume of a gas released in a chemical reaction over a period of time. What was the average rate of reaction, in cm3/s, over the first 40s? (Image from https://www.sqa.org.uk/files_ccc/ChemistrySQPRN5.pdf)
    Question Image
    50
    0.8
    1.25
    40
    30s
  • Q8
    The graph shows the change on volume of a gas released in a chemical reaction over a period of time. What was the average rate of reaction, in cm3/s, between 40 and 60s? (Image from https://www.sqa.org.uk/files_ccc/ChemistrySQPRN5.pdf)
    Question Image
    1.25
    1
    0.5
    2
    30s

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