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 11 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
- 4.
The slope of a graph of concentration versus time represents the:
A.Activation energy
B.Rate constant
C.Rate of reaction
D.Total yield
- 5.
According to collision theory, if the concentration of a reactant in a solution is doubled at a constant temperature, which statement correctly describes the resulting changes to the collision frequency and the fraction of collisions that are successful?
A.The collision frequency doubles and the fraction of successful collisions increases.
B.The collision frequency remains constant but the fraction of successful collisions increases.
C.The collision frequency doubles but the fraction of successful collisions remains constant.
D.The collision frequency increases and the activation energy () of the reaction decreases.
- 6.
Which of the following would NOT be suitable for measuring the rate of reaction: ?
A.Measuring the change in pH
B.Measuring the change in temperature (thermometric titration)
C.Measuring the volume of gas produced
D.Measuring the change in electrical conductivity
- 7.
Which of the following must be true for a collision between and to successfully produce ?
A.The collision must be perfectly elastic
B.The molecules must be aligned such that the and bonds can break simultaneously
C.The total kinetic energy must be less than the potential energy of the products
D.The reaction must be carried out in the dark
- 8.
Consider the reaction which occurs via the following two-step mechanism:
Step 1: (fast equilibrium) Step 2: (slow rate-determining step)
The potential energy profile for this reaction is shown in the diagram. Based on the provided values, what is the activation energy () for the reverse reaction of Step 2 ()?
A.kJ mol
B.kJ mol
C.kJ mol
D.kJ mol
- 9.
The rate constant of a reaction is found to increase by a factor of 100 when the temperature is raised from K to K. What is the activation energy in kJ mol?
A.46
B.92
C.23
D.180
- 10.
Which of the following statements about the 'rate-determining step' is correct?
A.It is the step with the highest activation energy in a multi-step mechanism.
B.It is always the first step in any reaction mechanism.
C.It is the fastest step in a mechanism.
D.Its molecularity must be the same as the overall order of the reaction.
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)
SubtopicRate expression and reaction mechanism (HL) under Chemical Kinetics for Grade 11 IB.
Preview questions (no answers)
- 1.
- Rate expression and reaction mechanism (HL): practice question 1 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 2.
- Rate expression and reaction mechanism (HL): practice question 2 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 3.
- Rate expression and reaction mechanism (HL): practice question 3 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 4.
- Rate expression and reaction mechanism (HL): practice question 4 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 5.
- Rate expression and reaction mechanism (HL): practice question 5 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 6.
- Rate expression and reaction mechanism (HL): practice question 6 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 7.
- Rate expression and reaction mechanism (HL): practice question 7 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 8.
- Rate expression and reaction mechanism (HL): practice question 8 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 9.
- Rate expression and reaction mechanism (HL): practice question 9 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 10.
- Rate expression and reaction mechanism (HL): practice question 10 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
Download the worksheet for Chemical Kinetics - Rate expression and reaction mechanism (HL) to practice offline. It includes additional chapter-level practice questions.
Activation energy (HL)
SubtopicActivation energy (HL) under Chemical Kinetics for Grade 11 IB.
Preview questions (no answers)
- 1.
- Activation energy (HL): practice question 1 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 2.
- Activation energy (HL): practice question 2 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 3.
- Activation energy (HL): practice question 3 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 4.
- Activation energy (HL): practice question 4 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 5.
- Activation energy (HL): practice question 5 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 6.
- Activation energy (HL): practice question 6 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 7.
- Activation energy (HL): practice question 7 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 8.
- Activation energy (HL): practice question 8 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 9.
- Activation energy (HL): practice question 9 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
- 10.
- Activation energy (HL): practice question 10 for Chemical Kinetics?
A.Option A
B.Option B
C.Option C
D.Option D
Download the worksheet for Chemical Kinetics - Activation energy (HL) to practice offline. It includes additional chapter-level practice questions.