Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
CHEMISTRY
Paper 2 Organic and Physical Chemistry
Monday 16 June 2025 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
3
Instructions
• 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). 9
• 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 105.
*Jun257405201*
IB/M/Jun25/G4007/V7 7405/2
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 This question is about different ways to make 1,2-dichlorobutane.
0 1 . 1 Give the name of the mechanism for reaction 1.
State one essential condition needed for reaction 1.
[2 marks]
Name of mechanism
Essential condition
0 1 . 2 Give equations to show three essential steps in the mechanism for reaction 1.
[3 marks]
*02*
IB/M/Jun25/7405/2
, 3
Do not write
outside the
0 1 . 3 Suggest two reasons why using reaction 1 is likely to give a low yield of box
1,2-dichlorobutane.
[2 marks]
Reason 1
Reason 2
0 1 . 4 Give a suitable reagent and conditions needed for reaction 2.
[2 marks]
Reagent
Conditions
0 1 . 5 Identify the reagent and name the mechanism for reaction 3.
[2 marks]
Reagent
Name of mechanism
0 1 . 6 Use of the reagent for reaction 2 followed by the reagent for reaction 3 gives another
organic product.
Give the structure of the other organic product.
[1 mark]
12
Turn over ►
*03*
IB/M/Jun25/7405/2
, 4
Do not write
outside the
0 2 This question is about isomerism. box
Compound L has this structure.
0 2 . 1 Use IUPAC rules to name L.
Explain why L exists as stereoisomers.
[3 marks]
Name
Explanation
0 2 . 2 Compound M has the same carbon chain as L but the double bond is in a
different position.
M also exists as stereoisomers.
Draw the structural formula of M.
Explain why M exists as stereoisomers.
[2 marks]
Structural formula
Explanation
*04*
IB/M/Jun25/7405/2
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
CHEMISTRY
Paper 2 Organic and Physical Chemistry
Monday 16 June 2025 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
3
Instructions
• 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). 9
• 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 105.
*Jun257405201*
IB/M/Jun25/G4007/V7 7405/2
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 This question is about different ways to make 1,2-dichlorobutane.
0 1 . 1 Give the name of the mechanism for reaction 1.
State one essential condition needed for reaction 1.
[2 marks]
Name of mechanism
Essential condition
0 1 . 2 Give equations to show three essential steps in the mechanism for reaction 1.
[3 marks]
*02*
IB/M/Jun25/7405/2
, 3
Do not write
outside the
0 1 . 3 Suggest two reasons why using reaction 1 is likely to give a low yield of box
1,2-dichlorobutane.
[2 marks]
Reason 1
Reason 2
0 1 . 4 Give a suitable reagent and conditions needed for reaction 2.
[2 marks]
Reagent
Conditions
0 1 . 5 Identify the reagent and name the mechanism for reaction 3.
[2 marks]
Reagent
Name of mechanism
0 1 . 6 Use of the reagent for reaction 2 followed by the reagent for reaction 3 gives another
organic product.
Give the structure of the other organic product.
[1 mark]
12
Turn over ►
*03*
IB/M/Jun25/7405/2
, 4
Do not write
outside the
0 2 This question is about isomerism. box
Compound L has this structure.
0 2 . 1 Use IUPAC rules to name L.
Explain why L exists as stereoisomers.
[3 marks]
Name
Explanation
0 2 . 2 Compound M has the same carbon chain as L but the double bond is in a
different position.
M also exists as stereoisomers.
Draw the structural formula of M.
Explain why M exists as stereoisomers.
[2 marks]
Structural formula
Explanation
*04*
IB/M/Jun25/7405/2
