Candidate surname Other names
Centre Number Candidate Number
May 2025 Edexcel: AS Level
Chemistry 8CH0/02 Paper 2 – Core
Organic and Physical Chemistry –
Merged Question Paper & Mark
Scheme
Paper
Chemistry 🟐 🟐
Advanced Subsidiary
PAPER 2: Core Organic and Physical Chemistry
Marks
Instructions
•• Use black ink or ball‑point pen.
If pencil is used for diagrams/sketches/graphs it must be dark (HB or B).
• Fill in the boxes at the top of this page with your name,
centre number 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 80.
•Exam
The Resource
–
marks for Summary
each question are shown in brackets
This May 2025 EdexcelasAS
use this as a guide to how
Levelmuch time to8CH0/02
spend on document
each question.
•including
Chemistry merges the official question
For
paper the
and question
mark marked
scheme for with
Paper an
2: asterisk
Core (*),
Organic marks
and will
Physical be awarded
Chemistry.for your ability
It covers topics
to structure yourand
structure answer logically,
bonding showing
in organic how the reaction
compounds, points that you make energetics,
mechanisms, are related
or follow on from each other where appropriate.
•
kinetics, equilibrium, and physical chemistry mathematical techniques. The merged format
A Periodic
provides Tablewith
students is printed on the into
direct insight backexaminer
cover of expectations,
this paper. mark allocation, and the
range of question types encountered. Each question is paired with the official marking
Advice
•
guidance, supporting focused revision, self-assessment, and the development of strong
Read each question
problem-solving carefully before
and explanatory skills. you start to answer
An essential it.for excelling in the 2025
resource
•
Edexcel
ShowAS Levelworking
all your Chemistry Paper 2 examination.
in calculations and include units where appropriate.
• Check your answers if you have time at the end.
Turn over
P77831A
©2025 Pearson Education Ltd.
Y:1/1/1/
, Answer ALL questions.
Some questions must be answered with a cross in a box . If you change your mind about an
DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 This question is about a naturally‑occurring compound called myrcene, which is
found in many plants.
The skeletal formula of myrcene is shown.
(a) What is the molecular formula of myrcene?
(1)
A C5H5
B C5H8
C C10H10
DO NOT WRITE IN THIS AREA
D C10H16
(b) What is the maximum number of moles of bromine molecules that could react
with one mole of myrcene in the dark?
(1)
A 2
B 3
C 4
D 6
(c) Myrcene is a dimer of isoprene.
Isoprene has the skeletal formula shown.
DO NOT WRITE IN THIS AREA
Which is the IUPAC name for isoprene?
(1)
A 2‑methylbut‑1,3‑ene
B 2‑methylbuta‑1,3‑diene
C 1,3‑diene‑2‑methylbutane
D 2‑methylpent‑1,3‑ene
2
■■■■
, (d) Which reagent would convert an alkene group into a diol?
(1)
A hydrogen gas and a nickel catalyst
DO NOT WRITE IN THIS AREA
B acidified potassium dichromate(VI)
C acidified potassium manganate(VII)
D steam and an acid catalyst
(Total for Question 1 = 4 marks)
2 Which compound must be named using the E/Z system and could not be named
using the cis/trans system?
A HOOC CH2 CH2 COOH
B HOOC CH2 CBr CH COOH
C HOOC CH2 CBr CBr2
D HOOC (CH2)2 CH CH (CH2)2 COOH
DO NOT WRITE IN THIS AREA
(Total for Question 2 = 1 mark)
DO NOT WRITE IN THIS AREA
3
■■■■ Turn over
, 3 This question is about the combustion of alcohols.
The table shows the enthalpy change of combustion for a series of alcohols.
DO NOT WRITE IN THIS AREA
Enthalpy change of combustion
Name Formula
/ kJ mol–1
methanol CH3OH –726
ethanol C2H5OH –1367
propan‑1‑ol C3H7OH –2021
butan‑1‑ol C4H9OH –2676
(a) Predict the enthalpy change of combustion of hexan‑1‑ol, C6H13OH.
(1)
DO NOT WRITE IN THIS AREA
. .............................................................. kJ mol –1
(b) The enthalpy change of combustion of octan‑1‑ol can be determined using the
equipment shown in the diagram.
Procedure
A spirit burner was filled with liquid octan‑1‑ol.
The burner was weighed, lit and then used to raise the temperature of a quantity
of water in a calorimeter.
The burner was then extinguished and reweighed.
thermometer
DO NOT WRITE IN THIS AREA
calorimeter
water
spirit burner
octan-1-ol
4
■■■■
Centre Number Candidate Number
May 2025 Edexcel: AS Level
Chemistry 8CH0/02 Paper 2 – Core
Organic and Physical Chemistry –
Merged Question Paper & Mark
Scheme
Paper
Chemistry 🟐 🟐
Advanced Subsidiary
PAPER 2: Core Organic and Physical Chemistry
Marks
Instructions
•• Use black ink or ball‑point pen.
If pencil is used for diagrams/sketches/graphs it must be dark (HB or B).
• Fill in the boxes at the top of this page with your name,
centre number 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 80.
•Exam
The Resource
–
marks for Summary
each question are shown in brackets
This May 2025 EdexcelasAS
use this as a guide to how
Levelmuch time to8CH0/02
spend on document
each question.
•including
Chemistry merges the official question
For
paper the
and question
mark marked
scheme for with
Paper an
2: asterisk
Core (*),
Organic marks
and will
Physical be awarded
Chemistry.for your ability
It covers topics
to structure yourand
structure answer logically,
bonding showing
in organic how the reaction
compounds, points that you make energetics,
mechanisms, are related
or follow on from each other where appropriate.
•
kinetics, equilibrium, and physical chemistry mathematical techniques. The merged format
A Periodic
provides Tablewith
students is printed on the into
direct insight backexaminer
cover of expectations,
this paper. mark allocation, and the
range of question types encountered. Each question is paired with the official marking
Advice
•
guidance, supporting focused revision, self-assessment, and the development of strong
Read each question
problem-solving carefully before
and explanatory skills. you start to answer
An essential it.for excelling in the 2025
resource
•
Edexcel
ShowAS Levelworking
all your Chemistry Paper 2 examination.
in calculations and include units where appropriate.
• Check your answers if you have time at the end.
Turn over
P77831A
©2025 Pearson Education Ltd.
Y:1/1/1/
, Answer ALL questions.
Some questions must be answered with a cross in a box . If you change your mind about an
DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 This question is about a naturally‑occurring compound called myrcene, which is
found in many plants.
The skeletal formula of myrcene is shown.
(a) What is the molecular formula of myrcene?
(1)
A C5H5
B C5H8
C C10H10
DO NOT WRITE IN THIS AREA
D C10H16
(b) What is the maximum number of moles of bromine molecules that could react
with one mole of myrcene in the dark?
(1)
A 2
B 3
C 4
D 6
(c) Myrcene is a dimer of isoprene.
Isoprene has the skeletal formula shown.
DO NOT WRITE IN THIS AREA
Which is the IUPAC name for isoprene?
(1)
A 2‑methylbut‑1,3‑ene
B 2‑methylbuta‑1,3‑diene
C 1,3‑diene‑2‑methylbutane
D 2‑methylpent‑1,3‑ene
2
■■■■
, (d) Which reagent would convert an alkene group into a diol?
(1)
A hydrogen gas and a nickel catalyst
DO NOT WRITE IN THIS AREA
B acidified potassium dichromate(VI)
C acidified potassium manganate(VII)
D steam and an acid catalyst
(Total for Question 1 = 4 marks)
2 Which compound must be named using the E/Z system and could not be named
using the cis/trans system?
A HOOC CH2 CH2 COOH
B HOOC CH2 CBr CH COOH
C HOOC CH2 CBr CBr2
D HOOC (CH2)2 CH CH (CH2)2 COOH
DO NOT WRITE IN THIS AREA
(Total for Question 2 = 1 mark)
DO NOT WRITE IN THIS AREA
3
■■■■ Turn over
, 3 This question is about the combustion of alcohols.
The table shows the enthalpy change of combustion for a series of alcohols.
DO NOT WRITE IN THIS AREA
Enthalpy change of combustion
Name Formula
/ kJ mol–1
methanol CH3OH –726
ethanol C2H5OH –1367
propan‑1‑ol C3H7OH –2021
butan‑1‑ol C4H9OH –2676
(a) Predict the enthalpy change of combustion of hexan‑1‑ol, C6H13OH.
(1)
DO NOT WRITE IN THIS AREA
. .............................................................. kJ mol –1
(b) The enthalpy change of combustion of octan‑1‑ol can be determined using the
equipment shown in the diagram.
Procedure
A spirit burner was filled with liquid octan‑1‑ol.
The burner was weighed, lit and then used to raise the temperature of a quantity
of water in a calorimeter.
The burner was then extinguished and reweighed.
thermometer
DO NOT WRITE IN THIS AREA
calorimeter
water
spirit burner
octan-1-ol
4
■■■■
