WJEC GCSE Science Double Award Rate of chemical change (Unit 2) overview quiz quiz
14questions. Pick an answer and you'll see why right away.
What does the rate of a reaction measure?
According to collision theory, what must happen for particles to react?
What is the minimum energy needed for a successful collision called?
Why does increasing concentration speed up a reaction?
Why does increasing temperature speed up a reaction?
Why does powdering a solid speed up its reaction?
What is a catalyst?
How does a catalyst increase the rate of a reaction?
Which apparatus measures the volume of gas given off in a reaction?
In the sodium thiosulfate and acid practical, what is measured?
On a graph of gas volume against time, what does a steeper line show?
Two reactions make the same final volume of gas, but reaction X is steeper and finishes first. What does this mean?
Why does the rate of most reactions decrease over time?
If 60 cm3 of gas is collected in 30 s, what is the average rate?