000001
AQA
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
T
A-level
ES
CHEMISTRY
Paper 2 Organic and Physical Chemistry B
Tuesday 18 June 2024 Morning Time allowed: 2 hours
E
Materials
TH
For Examiner’s Use
For this paper you must have:
• the Periodic Table/Data Booklet, provided as an insert (enclosed) Question Mark
• a ruler with millimetre measurements
1
• a scientific calculator, which you are expected to use where appropriate.
2
Instructions 3
•
LL
Use black ink or black ball-point pen. 4
• Fill in the boxes at the top of this page.
5
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write outside 6
the box around each page or on blank pages. 7
A
• If you need extra space for your answer(s), use the lined pages at the end of 8
this book. Write the question number against your answer(s).
• All working must be shown. 9
• Do all rough work in this book. Cross through any work you do not want to 10
be marked. 11
Information TOTAL
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 105.
IB/M/Jun24/G4006/E6 7405/2
Page 1 of 32
,000002
2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 Propanone reacts with bromine in alkaline conditions.
CH3COCH3 + Br2 + OH– ⟶ CH3COCH2Br + Br – + H2O
The rate equation for this reaction is
Rate = k [CH3COCH3] [OH–]
0 1 . 1 Sketch a graph on the axes provided to show how, at constant temperature, the
T
concentration of bromine changes during this reaction.
[1 mark]
ES
B
E
TH
LL
A
*02*
IB/M/Jun24/7405/2
Page 2 of 32
,000003
3
Do not write
outside the
0 1 . 2 box
Table 1 shows the initial rate of this reaction for experiments using different mixtures
containing propanone, bromine and hydroxide ions.
Table 1
[CH3COCH3] [Br2] [OH–] Initial rate
Experiment
/ mol dm–3 / mol dm–3 / mol dm–3 / mol dm–3 s–1
1 1.50 × 10–2 2.50 × 10–2 2.50 × 10–2 2.75 × 10–11
2 1.50 × 10–2 2.50 × 10–2 8.25 × 10–11
3 3.75 × 10–3 5.00 × 10–2 1.00 × 10–1
T
ES
Complete Table 1.
Use the data from experiment 1 to calculate the rate constant k for this reaction.
Give the units for the rate constant.
B [5 marks]
E
TH
LL
A
k Units
Question 1 continues on the next page
Turn over ►
*03*
IB/M/Jun24/7405/2
Page 3 of 32
, 000004
4
Do not write
outside the
0 1 . 3 box
Figure 1 shows an incomplete mechanism for this reaction.
Figure 1
T
ES
B
E
Complete the mechanism in Figure 1 by adding four curly arrows and any relevant
TH
lone pair(s) of electrons.
[4 marks]
0 1 . 4 Use evidence from the rate equation to explain why Step 1 is the
rate determining step.
LL
[1 mark]
11
A
*04*
IB/M/Jun24/7405/2
Page 4 of 32
AQA
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
T
A-level
ES
CHEMISTRY
Paper 2 Organic and Physical Chemistry B
Tuesday 18 June 2024 Morning Time allowed: 2 hours
E
Materials
TH
For Examiner’s Use
For this paper you must have:
• the Periodic Table/Data Booklet, provided as an insert (enclosed) Question Mark
• a ruler with millimetre measurements
1
• a scientific calculator, which you are expected to use where appropriate.
2
Instructions 3
•
LL
Use black ink or black ball-point pen. 4
• Fill in the boxes at the top of this page.
5
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write outside 6
the box around each page or on blank pages. 7
A
• If you need extra space for your answer(s), use the lined pages at the end of 8
this book. Write the question number against your answer(s).
• All working must be shown. 9
• Do all rough work in this book. Cross through any work you do not want to 10
be marked. 11
Information TOTAL
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 105.
IB/M/Jun24/G4006/E6 7405/2
Page 1 of 32
,000002
2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 Propanone reacts with bromine in alkaline conditions.
CH3COCH3 + Br2 + OH– ⟶ CH3COCH2Br + Br – + H2O
The rate equation for this reaction is
Rate = k [CH3COCH3] [OH–]
0 1 . 1 Sketch a graph on the axes provided to show how, at constant temperature, the
T
concentration of bromine changes during this reaction.
[1 mark]
ES
B
E
TH
LL
A
*02*
IB/M/Jun24/7405/2
Page 2 of 32
,000003
3
Do not write
outside the
0 1 . 2 box
Table 1 shows the initial rate of this reaction for experiments using different mixtures
containing propanone, bromine and hydroxide ions.
Table 1
[CH3COCH3] [Br2] [OH–] Initial rate
Experiment
/ mol dm–3 / mol dm–3 / mol dm–3 / mol dm–3 s–1
1 1.50 × 10–2 2.50 × 10–2 2.50 × 10–2 2.75 × 10–11
2 1.50 × 10–2 2.50 × 10–2 8.25 × 10–11
3 3.75 × 10–3 5.00 × 10–2 1.00 × 10–1
T
ES
Complete Table 1.
Use the data from experiment 1 to calculate the rate constant k for this reaction.
Give the units for the rate constant.
B [5 marks]
E
TH
LL
A
k Units
Question 1 continues on the next page
Turn over ►
*03*
IB/M/Jun24/7405/2
Page 3 of 32
, 000004
4
Do not write
outside the
0 1 . 3 box
Figure 1 shows an incomplete mechanism for this reaction.
Figure 1
T
ES
B
E
Complete the mechanism in Figure 1 by adding four curly arrows and any relevant
TH
lone pair(s) of electrons.
[4 marks]
0 1 . 4 Use evidence from the rate equation to explain why Step 1 is the
rate determining step.
LL
[1 mark]
11
A
*04*
IB/M/Jun24/7405/2
Page 4 of 32
