Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Tuesday 9 June 2026 Mark Scheme (Results)
Morning (Time: 1 hour 45 minutes) Paper
reference 9CH0/02
Chemistry
Summer 2026
Advanced
PAPER 2: Advanced Organic and Physical Chemistry
You must have: Total Marks
Scientific calculator, Data Booklet, ruler
Pearson Edexcel Advanced Level in Chemistry
Instructions
• Use black ink or ball‑point pen.
9CH0/02
• IfFillpencil is used for diagrams/sketches/graphs it must be dark (HB or B).
• centre number
in the boxes at the top of this page with your name,
and candidate number.
• Answer all questions.
• Answer the questions in the spaces provided
– there may be more space than you need.
Information
• The total mark for this paper is 90.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• toForstructure
the question marked with an asterisk (*), marks will be awarded for your ability
your answer logically, showing the points that you make are related or
follow on from each other where appropriate.
• A Periodic Table is printed on the back cover of this paper.
Advice
• Read each question carefully before you start to answer it.
• Show all your working in calculations and include units where appropriate.
• Check your answers if you have time at the end. Turn over
P74454APearson Education Ltd.
P:1/1/1/1/1/1/1/1/1/1/
*P74454A0132*
, Edexcel and BTEC Qualifications
Edexcel and BTEC qualifications are awarded by Pearson, the UK’s
largest awarding body. We provide a wide range of qualifications
including academic, vocational, occupational and specific
programmes for employers. For further information visit our
qualifications websites at or .
Alternatively, you can get in touch with us using the details on our
contact us page at
Pearson: helping people progress, everywhere
Pearson aspires to be the world’s leading learning company. Our aim is to help
everyone progress in their lives through education. We believe in every kind of
learning, for all kinds of people, wherever they are in the world. We’ve been
involved in education for over 150 years, and by working across 70 countries, in
BLANK PAGE 100 languages, we have built an international reputation for our commitment to
high standards and raising achievement through innovation in education. Find
out more about how we can help you and your students at:
Summer 2026
Question Paper Log Number P74454A
Publication Code 9CH0_02_2606_MS
All the material in this publication is
Pearson
2
*P74454A0232*
, Answer ALL questions.
Some questions must be answered with a cross in a box . If you change your mind about an
answer, put a line through the box and then mark your new answer with a cross .
General Marking Guidance
1 This question is about a diagram showing the Maxwell‑Boltzmann distribution of
molecular energies. • All candidates must receive the same treatment. Examiners must mark the
first candidate in exactly the same way as they mark the last.
Ea (catalyst) • Mark schemes should be applied positively. Candidates must be rewarded
for what they have shown they can do rather than penalised for omissions.
Ea • Examiners should mark according to the mark scheme not according to their
Number of molecules perception of where the grade boundaries may lie.
with energy, E • There is no ceiling on achievement. All marks on the mark scheme should be
used appropriately.
Q • All the marks on the mark scheme are designed to be awarded. Examiners
should always award full marks if deserved, i.e. if the answer matches the
mark scheme. Examiners should also be prepared to award zero marks if the
candidate’s response is not worthy of credit according to the mark scheme.
(a) What should be the label on the x axis?
(1) • Where some judgement is required, mark schemes will provide the principles
A activation energy by which marks will be awarded and exemplification may be limited.
B energy • When examiners are in doubt regarding the application of the mark scheme
to a candidate’s response, the team leader must be consulted.
C rate
• Crossed out work should be marked UNLESS the candidate has replaced it
D time
with an alternative response.
(b) What does area Q show?
(1)
A total number of molecules that cannot react
B extra number of molecules that can react without a catalyst
C total number of molecules that can react with a catalyst present
D extra number of molecules that can react with a catalyst present
(Total for Question 1 = 2 marks)
3
*P74454A0332* Turn over
, Question Answer Mark
Number
1(a) The only correct answer is B (energy) (1)
2 Phosphine, PH3 , is a colourless gas. A is not correct because each activation energy is a single specific value
(a) Draw the dot‑and‑cross diagram of phosphine. C is not correct because rate does not affect a Maxwell-Boltzmann distribution
Show only the outer shell electrons of hydrogen and phosphorus.
(1) D is not correct because time is not a factor on a Maxwell-Boltzmann distribution
Question Answer Mark
Number
1(b) The only correct answer is D (extra number of molecules that can react with a catalyst present) (1)
A is not correct because this is the area to the left of area Y
B is not correct because this is the area to the right of Y
C is not correct because this is Y plus the area to the right of Y
(Total for Question 1 = 2 mark)
(b) Predict the bond angle and shape of the PH2– ion formed when phosphine loses
a proton.
(2)
Bond angle
................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shape
................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
*P74454A0432*
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Tuesday 9 June 2026 Mark Scheme (Results)
Morning (Time: 1 hour 45 minutes) Paper
reference 9CH0/02
Chemistry
Summer 2026
Advanced
PAPER 2: Advanced Organic and Physical Chemistry
You must have: Total Marks
Scientific calculator, Data Booklet, ruler
Pearson Edexcel Advanced Level in Chemistry
Instructions
• Use black ink or ball‑point pen.
9CH0/02
• IfFillpencil is used for diagrams/sketches/graphs it must be dark (HB or B).
• centre number
in the boxes at the top of this page with your name,
and candidate number.
• Answer all questions.
• Answer the questions in the spaces provided
– there may be more space than you need.
Information
• The total mark for this paper is 90.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• toForstructure
the question marked with an asterisk (*), marks will be awarded for your ability
your answer logically, showing the points that you make are related or
follow on from each other where appropriate.
• A Periodic Table is printed on the back cover of this paper.
Advice
• Read each question carefully before you start to answer it.
• Show all your working in calculations and include units where appropriate.
• Check your answers if you have time at the end. Turn over
P74454APearson Education Ltd.
P:1/1/1/1/1/1/1/1/1/1/
*P74454A0132*
, Edexcel and BTEC Qualifications
Edexcel and BTEC qualifications are awarded by Pearson, the UK’s
largest awarding body. We provide a wide range of qualifications
including academic, vocational, occupational and specific
programmes for employers. For further information visit our
qualifications websites at or .
Alternatively, you can get in touch with us using the details on our
contact us page at
Pearson: helping people progress, everywhere
Pearson aspires to be the world’s leading learning company. Our aim is to help
everyone progress in their lives through education. We believe in every kind of
learning, for all kinds of people, wherever they are in the world. We’ve been
involved in education for over 150 years, and by working across 70 countries, in
BLANK PAGE 100 languages, we have built an international reputation for our commitment to
high standards and raising achievement through innovation in education. Find
out more about how we can help you and your students at:
Summer 2026
Question Paper Log Number P74454A
Publication Code 9CH0_02_2606_MS
All the material in this publication is
Pearson
2
*P74454A0232*
, Answer ALL questions.
Some questions must be answered with a cross in a box . If you change your mind about an
answer, put a line through the box and then mark your new answer with a cross .
General Marking Guidance
1 This question is about a diagram showing the Maxwell‑Boltzmann distribution of
molecular energies. • All candidates must receive the same treatment. Examiners must mark the
first candidate in exactly the same way as they mark the last.
Ea (catalyst) • Mark schemes should be applied positively. Candidates must be rewarded
for what they have shown they can do rather than penalised for omissions.
Ea • Examiners should mark according to the mark scheme not according to their
Number of molecules perception of where the grade boundaries may lie.
with energy, E • There is no ceiling on achievement. All marks on the mark scheme should be
used appropriately.
Q • All the marks on the mark scheme are designed to be awarded. Examiners
should always award full marks if deserved, i.e. if the answer matches the
mark scheme. Examiners should also be prepared to award zero marks if the
candidate’s response is not worthy of credit according to the mark scheme.
(a) What should be the label on the x axis?
(1) • Where some judgement is required, mark schemes will provide the principles
A activation energy by which marks will be awarded and exemplification may be limited.
B energy • When examiners are in doubt regarding the application of the mark scheme
to a candidate’s response, the team leader must be consulted.
C rate
• Crossed out work should be marked UNLESS the candidate has replaced it
D time
with an alternative response.
(b) What does area Q show?
(1)
A total number of molecules that cannot react
B extra number of molecules that can react without a catalyst
C total number of molecules that can react with a catalyst present
D extra number of molecules that can react with a catalyst present
(Total for Question 1 = 2 marks)
3
*P74454A0332* Turn over
, Question Answer Mark
Number
1(a) The only correct answer is B (energy) (1)
2 Phosphine, PH3 , is a colourless gas. A is not correct because each activation energy is a single specific value
(a) Draw the dot‑and‑cross diagram of phosphine. C is not correct because rate does not affect a Maxwell-Boltzmann distribution
Show only the outer shell electrons of hydrogen and phosphorus.
(1) D is not correct because time is not a factor on a Maxwell-Boltzmann distribution
Question Answer Mark
Number
1(b) The only correct answer is D (extra number of molecules that can react with a catalyst present) (1)
A is not correct because this is the area to the left of area Y
B is not correct because this is the area to the right of Y
C is not correct because this is Y plus the area to the right of Y
(Total for Question 1 = 2 mark)
(b) Predict the bond angle and shape of the PH2– ion formed when phosphine loses
a proton.
(2)
Bond angle
................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shape
................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
*P74454A0432*
