Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signatuure
I declare this is my own work.
IB/M/Jun23/E6aqa
AS
CHEMISTRY
Paper 2 Organic and Physical Chemistry
7404/2
Tuesday 23 May 2023Morning Time allowed: 1 hour 30 minutes
Materials
For this paper you must have:
the Periodic Table/Data Sheet, provided as an insert (enclosed)
a ruler with millimetre measurements
a scientific calculator, which you are expected to use where appropriate.
Instructions
Use black ink or black ball-point pen.
Fill in the boxes at the top of this page.
Answer all questions.
You must answer the questions in the spaces provided. Do not write outside
the box around each page or on blank pages.
If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s).
All working must be shown.
Do all rough work in this book. Cross through any work you do not
want to be marked.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 80.For Examiner’s Use
QuestionMark
1
2
3
4
5
6
7
8
Section B
TOTAL IB/M/Jun23/E6Advice
You are advised to spend about 65 minutes on Section A and 25 minutes on Section B. 2
Do not writeoutside the
110
210Section A
Answer all questions in this section.box
01This 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.
.CH3CH2CH2CHO and CH3CH2CH(OH)CH3
[3 marks]
Reagent(s) Observation with CH3CH2CH2CHO Observation with CH3CH2CH(OH)CH3 .Cyclohexane and cyclohexene
[3 marks]
Reagent(s) Observation with cyclohexane Observation with cyclohexene 9Do not writeoutside the3
310.Table 1 gives the precise relative molecular masses (Mr) of some organic compounds
measured using high resolution mass spectrometry.
Table 1
Molecular formulaC5H12C5H10C6H6
Mr72.1416 70.1260to 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
Turn over ►box
Centre number Candidate number
Surname
Forename(s)
Candidate signatuure
I declare this is my own work.
IB/M/Jun23/E6aqa
AS
CHEMISTRY
Paper 2 Organic and Physical Chemistry
7404/2
Tuesday 23 May 2023Morning Time allowed: 1 hour 30 minutes
Materials
For this paper you must have:
the Periodic Table/Data Sheet, provided as an insert (enclosed)
a ruler with millimetre measurements
a scientific calculator, which you are expected to use where appropriate.
Instructions
Use black ink or black ball-point pen.
Fill in the boxes at the top of this page.
Answer all questions.
You must answer the questions in the spaces provided. Do not write outside
the box around each page or on blank pages.
If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s).
All working must be shown.
Do all rough work in this book. Cross through any work you do not
want to be marked.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 80.For Examiner’s Use
QuestionMark
1
2
3
4
5
6
7
8
Section B
TOTAL IB/M/Jun23/E6Advice
You are advised to spend about 65 minutes on Section A and 25 minutes on Section B. 2
Do not writeoutside the
110
210Section A
Answer all questions in this section.box
01This 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.
.CH3CH2CH2CHO and CH3CH2CH(OH)CH3
[3 marks]
Reagent(s) Observation with CH3CH2CH2CHO Observation with CH3CH2CH(OH)CH3 .Cyclohexane and cyclohexene
[3 marks]
Reagent(s) Observation with cyclohexane Observation with cyclohexene 9Do not writeoutside the3
310.Table 1 gives the precise relative molecular masses (Mr) of some organic compounds
measured using high resolution mass spectrometry.
Table 1
Molecular formulaC5H12C5H10C6H6
Mr72.1416 70.1260to 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
Turn over ►box
