Aqa
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
CHEMISTRY
Paper 2 Organic and Physical
Chemistry
Tuesday 23 May 2023 Morning Time allowed: 1 hour 30 minutes
Materials For Examiner’s Use
For this paper you must have:
the Periodic Table/Data Sheet, 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. 6
You must answer the questions in the spaces provided. Do not write outside
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). Section B
All working must be shown.
Do all rough work in this book. Cross through any work you do not TOTAL
want to be marked.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 80.
7404/2
,Advice
You are advised to spend about 65 minutes on Section A and 25 minutes on Section B.
7404/2
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 This question is about the analysis of organic compounds.
For each pair of compounds in Questions 01.1 and 01.2, give a reagent (or
combination of reagents) that could be added separately to each compound in a
single reaction to distinguish between them.
State what is observed in each case.
0 1 .1 CH3CH2CH2CHO and CH3CH2CH(OH)CH3
[3 marks]
Reagent(s)
Observation with CH3CH2CH2CHO
Observation with CH3CH2CH(OH)CH3
0 1 .2 Cyclohexane and cyclohexene
[3 marks]
Reagent(s)
Observation with cyclohexane
Observation with cyclohexene
final
, 3
Do not write
outside the
0 1 .3 Table 1 gives the precise relative molecular masses (Mr) of some organic compounds box
measured using high resolution mass spectrometry.
Table 1
Molecular formula C5H12 C5H10 C6H6
Mr 72.1416 70.1260 to be calculated
Use these data to find the relative atomic masses (Ar) of hydrogen and carbon.
Give your answers to 4 decimal places.
Use these calculated Ar values to find the relative molecular mass (Mr) of C6H6
Give your answer to 4 decimal places.
[3 marks]
Ar of hydrogen
Ar of carbon
Mr of C6H6 9
Turn over ►
final
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
CHEMISTRY
Paper 2 Organic and Physical
Chemistry
Tuesday 23 May 2023 Morning Time allowed: 1 hour 30 minutes
Materials For Examiner’s Use
For this paper you must have:
the Periodic Table/Data Sheet, 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. 6
You must answer the questions in the spaces provided. Do not write outside
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). Section B
All working must be shown.
Do all rough work in this book. Cross through any work you do not TOTAL
want to be marked.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 80.
7404/2
,Advice
You are advised to spend about 65 minutes on Section A and 25 minutes on Section B.
7404/2
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 This question is about the analysis of organic compounds.
For each pair of compounds in Questions 01.1 and 01.2, give a reagent (or
combination of reagents) that could be added separately to each compound in a
single reaction to distinguish between them.
State what is observed in each case.
0 1 .1 CH3CH2CH2CHO and CH3CH2CH(OH)CH3
[3 marks]
Reagent(s)
Observation with CH3CH2CH2CHO
Observation with CH3CH2CH(OH)CH3
0 1 .2 Cyclohexane and cyclohexene
[3 marks]
Reagent(s)
Observation with cyclohexane
Observation with cyclohexene
final
, 3
Do not write
outside the
0 1 .3 Table 1 gives the precise relative molecular masses (Mr) of some organic compounds box
measured using high resolution mass spectrometry.
Table 1
Molecular formula C5H12 C5H10 C6H6
Mr 72.1416 70.1260 to be calculated
Use these data to find the relative atomic masses (Ar) of hydrogen and carbon.
Give your answers to 4 decimal places.
Use these calculated Ar values to find the relative molecular mass (Mr) of C6H6
Give your answer to 4 decimal places.
[3 marks]
Ar of hydrogen
Ar of carbon
Mr of C6H6 9
Turn over ►
final
