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Q 1/8
Score 0
Which of the following changes will speed up a chemical reaction?
30
Decreasing concentration
Adding a catalyst
Increasing particle size
Decreasing temperature
Q 2/8
Score 0
Which of the following changes will not speed up a chemical reaction?
30
Increasing particle size
Increasing concentration
Increasing temperature
Adding a catalyst
8 questions
Q.
Which of the following changes will speed up a chemical reaction?
1
30 sec
Q.
Which of the following changes will not speed up a chemical reaction?
2
30 sec
Q.
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?
3
30 sec
Q.
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?
4
30 sec
Q.
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)
5
30 sec
Q.
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)
6
30 sec
Q.
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)
7
30 sec
Q.
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)
