June 2025 Edexcel: A Level Chemistry 9CH0/02 Paper 2 – Advanced Organic and Physical Chemistry – Merged Question Paper & Mark Scheme

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Centre Number Candidate Number
June 2025 Edexcel: A Level Chemistry
9CH0/02 Paper 2 – Advanced Organic
and Physical Chemistry – Merged
Question Paper & Mark Scheme




Paper


Chemistry 🟐 🟐


Advanced
PAPER 2: Advanced Organic and Physical Chemistry

Marks




Instructions
• Use black ink or ball‑point pen.
• Fill in theis used
If pencil for diagrams/sketches/graphs it must be dark (HB or B).
• centre number 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
Exam Resource Summary
marks for each question are shown in brackets
This June 2025 Pearson Edexcel A Level Chemistry 9CH0/02 document merges the official
– use this as a guide as to how much time to2:spend on each question.
• to structure your answer logically, showing how the points that you make
question paper and mark scheme for Paper Advanced Organic and Physical Chemistry . It
For the question marked with an asterisk (*), marks will be awarded for your ability
covers advanced topics including organic reaction mechanisms, modern analytical
are related
techniques, physical chemistry — such as thermodynamics, kinetics, equilibria and
quantitative
or follow onchemical methods.
from each other The merged
where format provides students with an integrated
appropriate.
•view
A Periodic Table is printed on the back cover ofand
of examiner expectations, mark allocation, thiseffective
paper. response structure. Each
question is paired with the official marking guidance, supporting targeted revision, self-
assessment and the development of confident problem-solving and explanatory skills. An
Advice
•essential resource for thorough preparation for the 2025 Edexcel A Level Chemistry
Read
Showeach question carefully before you
andstart to answer it.
• all your working in calculations include units where appropriate.
examination.

• Check your answers if you have time at the end. Turn over


P77833A
©2025 Pearson Education Ltd.
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, Answer ALL questions.

Some questions must be answered with a cross in a box . If you change your mind about an
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answer, put a line through the box and then mark your new answer with a cross .

1 This question is about mass spectrometry.
(a) Which molecule would not give a molecular ion peak with m/z = 74?
(1)
A C2H5COOH

B CHOCOOH

C CH2(OH)COOH

D CH3COOCH3


(b) The fragmentation pattern in a mass spectrum can be used to distinguish
between structural isomers.
Which m/z peak would be present in the mass spectrum of propanal, CH3CH2CHO,
but not in the mass spectrum of propanone, CH3COCH3?
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(1)
A 15

B 29

C 43

D 59
(Total for Question 1 = 2 marks)
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, 2 Intermolecular forces affect the physical properties of compounds.
(a) Which of these isomers, with the formula C8H18, will have the




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lowest boiling temperature?
(1)
A (CH3)2CHCH2C(CH3)3

B (CH3)2CHCH2CH(CH3)CH2CH3

C CH3CH2CH2C(CH3)2CH2CH3
D CH3CH2CH2CH2CH2CH2CH2CH3


(b) Pentan‑1‑ol and hexane have the same number of electrons but pentan‑1‑ol is
much less volatile than hexane.
Explain this difference in volatility.
(2)

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(c) Iodine is a solid at room temperature but on gentle heating it vaporises.

What bonds or forces are being broken?
(1)
A covalent bonds

B ionic bonds
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C London forces

D permanent dipole‑dipole forces




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