Chemical Kinetics
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Collision theory and rates of reaction
SubtopicCollision theory and rates of reaction under Chemical Kinetics for Grade 12 IB.
Preview questions (no answers)
- 1.
In a potential energy diagram, a catalyst provides a path with a ______.
A.Higher transition state
B.Lower activation energy
C.More positive
D.More negative
- 2.
What happens to the rate of a reaction as the concentration of reactants decreases over time?
A.It increases
B.It decreases
C.It stays constant
D.It fluctuates randomly
- 3.
An 'effective collision' is one that results in:
A.A decrease in temperature
B.The formation of products
C.An increase in activation energy
D.The destruction of the catalyst
Download the worksheet for Chemical Kinetics - Collision theory and rates of reaction to practice offline. It includes additional chapter-level practice questions.
Rate expression and reaction mechanism (HL only)
SubtopicRate expression and reaction mechanism (HL only) under Chemical Kinetics for Grade 12 IB.
Preview questions (no answers)
- 1.
Which of the following is the correct expression for the rate of disappearance of reactant in the reaction ?
A.B.C.D. - 2.
The units of a rate constant are . What is the overall order?
A.1
B.2
C.3
D.0
- 3.
Which of the following will NOT change the rate of a zero-order reaction?
A.Changing the temperature
B.Adding a catalyst
C.Changing the concentration of the reactant
D.Increasing the surface area of a solid reactant
Download the worksheet for Chemical Kinetics - Rate expression and reaction mechanism (HL only) to practice offline. It includes additional chapter-level practice questions.
Activation energy (HL only)
SubtopicActivation energy (HL only) under Chemical Kinetics for Grade 12 IB.
Preview questions (no answers)
- 1.
Which of the following describes an 'effective collision'?
A.Any collision between two reactant molecules
B.A collision that results in the formation of products
C.A collision where molecules bounce off each other
D.A collision that happens at high pressure
- 2.
If a reaction's rate triples when the temperature is increased slightly, which factor is mostly responsible?
A.An increase in collision frequency
B.An increase in the fraction of molecules with
C.A decrease in the activation energy
D.An increase in the concentration of reactants
- 3.
In the Arrhenius equation, if approaches infinity, what happens to the value of the rate constant ?
A.approaches 0
B.approaches
C.approaches
D.approaches infinity
Download the worksheet for Chemical Kinetics - Activation energy (HL only) to practice offline. It includes additional chapter-level practice questions.