Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
AS-Level EDEXCEL 2025
Chemistry PAPER 2
Pearson Edexcel Level 3 GCE
Tuesday 20 May 2025
Morning (Time: 1 hour 30 minutes) Paper
reference 8CH0/02
Chemistry
Advanced Subsidiary
PAPER 2: Core Organic and Physical Chemistry
You must have: Total Marks
Scientific calculator, Data Booklet, ruler
Instructions
• Use
If pencil is ink
black usedorfor diagrams/sketches/graphs
ball‑point pen. 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.
The marks for each question are shown in brackets
•
– use this as a guide as to how much time to spend on each question.
For the question marked with an asterisk (*), marks will be awarded for your ability
to structure your answer logically, showing how the points that you make are related
•Advice
or follow on from each other where appropriate.
A Periodic Table is printed on the back cover of this paper.
• Read each question carefully before you start to answer it.
• Show
• Check your answers if you have time at the end.
all your working in calculations and include units where appropriate.
Turn over
, 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
Candidate surname Other names
Centre Number Candidate Number
AS-Level EDEXCEL 2025
Chemistry PAPER 2
Pearson Edexcel Level 3 GCE
Tuesday 20 May 2025
Morning (Time: 1 hour 30 minutes) Paper
reference 8CH0/02
Chemistry
Advanced Subsidiary
PAPER 2: Core Organic and Physical Chemistry
You must have: Total Marks
Scientific calculator, Data Booklet, ruler
Instructions
• Use
If pencil is ink
black usedorfor diagrams/sketches/graphs
ball‑point pen. 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.
The marks for each question are shown in brackets
•
– use this as a guide as to how much time to spend on each question.
For the question marked with an asterisk (*), marks will be awarded for your ability
to structure your answer logically, showing how the points that you make are related
•Advice
or follow on from each other where appropriate.
A Periodic Table is printed on the back cover of this paper.
• Read each question carefully before you start to answer it.
• Show
• Check your answers if you have time at the end.
all your working in calculations and include units where appropriate.
Turn over
, 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
