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2024 AQA A-Level CHEMISTRY 7405/2 Paper 2 Organic and Physical Chemistry Verified Question Paper and Marking Scheme Attached June 2024 $7.99
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2024 AQA A-Level CHEMISTRY 7405/2 Paper 2 Organic and Physical Chemistry Verified Question Paper and Marking Scheme Attached June 2024
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2024 AQA A-Level CHEMISTRY 7405/2 Paper 2 Organic and Physical Chemistry Verified Question Paper and Marking Scheme Attached June 2024 A-level CHEMISTRY Paper 2 Organic and Physical Chemistry Tuesday 18 June 2024 Materials For this paper you must have: Morning • the Periodic...

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  • February 4, 2025
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  • 2024/2025
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  • 2024 aqa a level chemistry 74052 paper 2 organic

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  • 2024 AQA A-Level CHEMISTRY 7405

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2024 AQA A-Level CHEMISTRY 7405/2 Paper 2 Organic
and Physical Chemistry
Verified Question Paper and Marking Scheme Attached
June 2024
A-level
CHEMISTRY
Paper 2 Organic and Physical Chemistry


Tuesday 18 June 2024 Morning Time allowed: 2 hours
Materials
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
• 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
• 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.

, 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
concentration of bromine changes during this reaction.
[1 mark]

, 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



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.
[5 marks]




k Units

Question 1 continues on the next page
Turn over ►

, 4
Do not write
outside the
0 1 . 3 Figure 1 shows an incomplete mechanism for this reaction. box



Figure 1




Complete the mechanism in Figure 1 by adding four curly arrows and any relevant
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.
[1 mark]



11

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