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
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.
• 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).
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.
Advice
You are advised to spend about 65 minutes on Section A and 25 minutes on Section B.
*JUN217404201* IB/M/Jun21/E7 7404/2
, 2
Do not write
outside the
There are no questions printed on this page box
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
*02*
IB/M/Jun21/7404/2
, 3
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 Figure 1 shows the Maxwell–Boltzmann distribution of molecular energies in a
sample of gas.
Figure 1
0 1 . 1 Label the y-axis on Figure 1.
[1 mark]
0 1 . 2 State why the curve starts at the origin.
[1 mark]
0 1 . 3 State what X indicates on Figure 1.
[1 mark]
X indicates
0 1 . 4 Half of the gas molecules in the sample are removed.
The remaining gas molecules are kept at the same temperature.
Draw the new distribution of molecular energies for the remaining gas on Figure 1.
5
[2 marks]
Turn over ►
*03*
IB/M/Jun21/7404/2
, 4
Do not write
outside the
0 2 Alkenes react with bromine (Br2) box
0 2 . 1 Name and outline the mechanism for the reaction of cyclohexene with Br2
[5 marks]
Name of mechanism
Outline of mechanism
*04*
IB/M/Jun21/7404/2
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
CHEMISTRY
Paper 2 Organic and Physical Chemistry
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.
• 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).
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.
Advice
You are advised to spend about 65 minutes on Section A and 25 minutes on Section B.
*JUN217404201* IB/M/Jun21/E7 7404/2
, 2
Do not write
outside the
There are no questions printed on this page box
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
*02*
IB/M/Jun21/7404/2
, 3
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 Figure 1 shows the Maxwell–Boltzmann distribution of molecular energies in a
sample of gas.
Figure 1
0 1 . 1 Label the y-axis on Figure 1.
[1 mark]
0 1 . 2 State why the curve starts at the origin.
[1 mark]
0 1 . 3 State what X indicates on Figure 1.
[1 mark]
X indicates
0 1 . 4 Half of the gas molecules in the sample are removed.
The remaining gas molecules are kept at the same temperature.
Draw the new distribution of molecular energies for the remaining gas on Figure 1.
5
[2 marks]
Turn over ►
*03*
IB/M/Jun21/7404/2
, 4
Do not write
outside the
0 2 Alkenes react with bromine (Br2) box
0 2 . 1 Name and outline the mechanism for the reaction of cyclohexene with Br2
[5 marks]
Name of mechanism
Outline of mechanism
*04*
IB/M/Jun21/7404/2
