What name is given to the minimum amount of energy needed by particles for them to react when they collide?
Activation energy
Catalytic energy
Threshold energy
What is the name of the model which is used to explain how different factors affect the rate of a reaction?
Particle theory
Big Bang theory
Collision theory
What piece of apparatus could be used to measure the volume of gas produced in a reaction?
Gas syringe
Beaker
Top pan balance
Which of the following is a possible unit for rate of reaction?
cm3/s
m/s
N
Which of the following would speed up a reaction?
Using lumps instead of powder
Increasing the concentration of an acid
Decreasing the temperature
Which of the following will increase the frequency of successful collisions?
Increasing the temperature
Decreasing the pressure
Decreasing the concentration
Which of the following has the smallest surface area to volume ratio?
Limestone powder
Small limestone chips
Large limestone chips
Which of the following could be used in an experiment to measure the rate of a reaction that produces a dark coloured liquid product?
A newtonmeter
A gas syringe
A cross drawn on a piece of paper
Which of the following will increase the number of collisions?
Which of the following would give a steeper curve on a graph of volume of gas against time?
Low temperature
Low concentration
Higher temperature