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Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel International Advanced Level
Wednesday 28 May 2025
Morning (Time: 1 hour 45 minutes) Paper
reference WCH14/01
Chemistry
International Advanced Level
UNIT 4: Rates, Equilibria and Further
Organic Chemistry
You must have: Total Marks
Scientific calculator, Data Booklet, ruler
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 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.
• Into the question marked with an asterisk (*), marks will be awarded for your ability
structure your answer logically, showing how 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.
•• Try to answer every question.
Check your answers if you have time at the end. Turn over
P78745A
©2025 Pearson Education Ltd.
Y:1/1/1/1/
*P78745A0128*
, SECTION A
Answer ALL the questions in this section.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
You should aim to spend no more than 20 minutes on this section.
For each question, select one answer from A to D and put a cross in the box . If you
change your mind, put a line through the box and then mark your new answer with
a cross .
1: This question is about carbonyl compounds.
(a) Propanone reacts with hydrogen cyanide, HCN, in the presence of
potassium cyanide, KCN.
How is this reaction classified?
(1)
A electrophilic addition
B electrophilic substitution
C nucleophilic addition
D nucleophilic substitution
(b) What is the first step in the mechanism of the reaction between propanone and a
mixture of HCN and KCN?
(1)
A t he lone pair of electrons on the carbon of CN− attacking the
carbonyl Cδ+ of propanone
B t he lone pair of electrons on the nitrogen of CN− attacking the
carbonyl Cδ+ of propanone
C t he lone pair of electrons on the oxygen of propanone attacking the
Cδ+ of HCN
D t he lone pair of electrons on the oxygen of propanone attacking the
Hδ+ of HCN
(c) What is the name of the organic product formed in part (a)?
(1)
A 2-hydroxy-2-methylpropylamine
B 2-hydroxy-2-methylethylamine
C 2-hydroxy-2-methylethanenitrile
D 2-hydroxy-2-methylpropanenitrile
2
*P78745A0228*
, (d) Which of these carbonyl compounds would produce pale yellow crystals when
warmed with iodine in the presence of sodium hydroxide?
(1)
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
A butanone
B butanal
C pentan-3-one
D 2-methylpropanal
(e) What is the formula of the pale yellow crystals formed in part (d)?
(1)
A CI4
B CHI3
C CH2 I2
D CH3 I
(Total for Question 1 = 5 marks)
2: Which of these statements about the reaction of ethanoyl chloride with ammonia
is not correct?
A an amide is formed
B the reaction is exothermic
C misty fumes and white smoke are given off
D a gas is produced that turns damp red litmus paper blue
(Total for Question 2 = 1 mark)
3: Which of these substances would be expected to have the greatest standard
molar entropy?
A FeO
B FeS
C FeCl2
D FeCl3
(Total for Question 3 = 1 mark)
3
*P78745A0328* Turn over
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel International Advanced Level
Wednesday 28 May 2025
Morning (Time: 1 hour 45 minutes) Paper
reference WCH14/01
Chemistry
International Advanced Level
UNIT 4: Rates, Equilibria and Further
Organic Chemistry
You must have: Total Marks
Scientific calculator, Data Booklet, ruler
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 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.
• Into the question marked with an asterisk (*), marks will be awarded for your ability
structure your answer logically, showing how 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.
•• Try to answer every question.
Check your answers if you have time at the end. Turn over
P78745A
©2025 Pearson Education Ltd.
Y:1/1/1/1/
*P78745A0128*
, SECTION A
Answer ALL the questions in this section.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
You should aim to spend no more than 20 minutes on this section.
For each question, select one answer from A to D and put a cross in the box . If you
change your mind, put a line through the box and then mark your new answer with
a cross .
1: This question is about carbonyl compounds.
(a) Propanone reacts with hydrogen cyanide, HCN, in the presence of
potassium cyanide, KCN.
How is this reaction classified?
(1)
A electrophilic addition
B electrophilic substitution
C nucleophilic addition
D nucleophilic substitution
(b) What is the first step in the mechanism of the reaction between propanone and a
mixture of HCN and KCN?
(1)
A t he lone pair of electrons on the carbon of CN− attacking the
carbonyl Cδ+ of propanone
B t he lone pair of electrons on the nitrogen of CN− attacking the
carbonyl Cδ+ of propanone
C t he lone pair of electrons on the oxygen of propanone attacking the
Cδ+ of HCN
D t he lone pair of electrons on the oxygen of propanone attacking the
Hδ+ of HCN
(c) What is the name of the organic product formed in part (a)?
(1)
A 2-hydroxy-2-methylpropylamine
B 2-hydroxy-2-methylethylamine
C 2-hydroxy-2-methylethanenitrile
D 2-hydroxy-2-methylpropanenitrile
2
*P78745A0228*
, (d) Which of these carbonyl compounds would produce pale yellow crystals when
warmed with iodine in the presence of sodium hydroxide?
(1)
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
A butanone
B butanal
C pentan-3-one
D 2-methylpropanal
(e) What is the formula of the pale yellow crystals formed in part (d)?
(1)
A CI4
B CHI3
C CH2 I2
D CH3 I
(Total for Question 1 = 5 marks)
2: Which of these statements about the reaction of ethanoyl chloride with ammonia
is not correct?
A an amide is formed
B the reaction is exothermic
C misty fumes and white smoke are given off
D a gas is produced that turns damp red litmus paper blue
(Total for Question 2 = 1 mark)
3: Which of these substances would be expected to have the greatest standard
molar entropy?
A FeO
B FeS
C FeCl2
D FeCl3
(Total for Question 3 = 1 mark)
3
*P78745A0328* Turn over
