AQA-7405-2-CHEMISTRY QUESTION PAPER 2-A LEVEL-ORGANIC AND PHYSICAL CHEMISTRY-18Jun24.
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AQA-7405-2-CHEMISTRY QUESTION PAPER 2-A LEVEL-ORGANIC AND PHYSICAL CHEMISTRY-18Jun24.HIGHLY GRADED.
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...
aqa 7405 2 chemistry question paper 2 a level 2024
organic and physical chemistry
aqa chemistry a level paper 2
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A-level
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CHEMISTRY
Paper 2 Organic and Physical Chemistry B
Tuesday 18 June 2024 Morning Time allowed: 2 hours
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Materials
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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
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• a scientific calculator, which you are expected to use where appropriate.
2
Instructions 3
•
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Use black ink or black ball-point pen. 4
• Fill in the boxes at the top of this page.
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• 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
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• 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
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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
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concentration of bromine changes during this reaction.
[1 mark]
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*02*
IB/M/Jun24/7405/2
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0 1 . 2 box
Table 1 shows the initial rate of this reaction for experiments using different mixtures
containing propanone, bromine and hydroxide ions.
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]
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k Units
Question 1 continues on the next page
Turn over ►
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IB/M/Jun24/7405/2
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0 1 . 3 box
Figure 1 shows an incomplete mechanism for this reaction.
Figure 1
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Complete the mechanism in Figure 1 by adding four curly arrows and any relevant
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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.
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[1 mark]
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IB/M/Jun24/7405/2
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