worked solutions
model answers
, Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 1/Level 2 GCSE (9–1)
Friday 13 June 2025
Morning (Time: 1 hour 45 minutes) Paper
reference 1CH0/2H
Chemistry
PAPER 2
Higher Tier
You must have: Total Marks
Calculator, ruler, Periodic Table (enclosed)
Instructions
•• Use black ink or ball-point pen.
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.
•• Calculators may be used.
Any diagrams may NOT be accurately drawn, unless otherwise indicated.
• You must show all your working out with your answer clearly identified at the
end of your solution.
Information
•• The total mark for this paper is 100.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• structure
In questions marked with an asterisk (*), marks will be awarded for your ability to
your answer logically, showing how the points that you make are related or
follow on from each other where appropriate.
Advice
•• Read each question carefully before you start to answer it.
Try to answer every question.
• Check your answers if you have time at the end.
Turn over
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, Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about an
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 (a) A student carries out a flame test on a salt.
The student observes a yellow flame.
Which ion is in the salt?
(1)
A Ca2+
B Cu2+
C Na+
D Li+
(b) A molecule of a yellow substance is shown in Figure 1.
CH3
O2N C NO2
C C
C C
H C H
NO2
Figure 1
(i) What is the formula of this molecule?
(1)
A C6H5(NO2)3
B C6H2(CH3)(3NO2)
C C7H5N3O6
D C7H6N3O6
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, (ii) A bottle of this substance is labelled with the hazard symbol in Figure 2.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
Figure 2
State the danger associated with the contents of this bottle.
(1)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
(c) Yellow bananas emit ethene gas, C2H4 .
Draw one molecule of ethene, showing all covalent bonds.
(2)
(d) Gold has a yellow colour.
A gold nanosphere has a surface area of 305 nm2.
The surface area to volume ratio is 1 : 4.60.
Calculate the volume, in nm3, of the gold nanosphere.
(1)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
volume = ..................................................... . . . . . . . . . nm3
(Total for Question 1 = 6 marks)
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model answers
, Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 1/Level 2 GCSE (9–1)
Friday 13 June 2025
Morning (Time: 1 hour 45 minutes) Paper
reference 1CH0/2H
Chemistry
PAPER 2
Higher Tier
You must have: Total Marks
Calculator, ruler, Periodic Table (enclosed)
Instructions
•• Use black ink or ball-point pen.
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.
•• Calculators may be used.
Any diagrams may NOT be accurately drawn, unless otherwise indicated.
• You must show all your working out with your answer clearly identified at the
end of your solution.
Information
•• The total mark for this paper is 100.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• structure
In questions marked with an asterisk (*), marks will be awarded for your ability to
your answer logically, showing how the points that you make are related or
follow on from each other where appropriate.
Advice
•• Read each question carefully before you start to answer it.
Try to answer every question.
• Check your answers if you have time at the end.
Turn over
P75509RRRA
©2025 Pearson Education Ltd.
Y:1/1/1/1/1/1/1/1/1/1/1/1/1/1/1
*P75509RRRA0132* for more: tyrionpapers.com
, Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about an
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 (a) A student carries out a flame test on a salt.
The student observes a yellow flame.
Which ion is in the salt?
(1)
A Ca2+
B Cu2+
C Na+
D Li+
(b) A molecule of a yellow substance is shown in Figure 1.
CH3
O2N C NO2
C C
C C
H C H
NO2
Figure 1
(i) What is the formula of this molecule?
(1)
A C6H5(NO2)3
B C6H2(CH3)(3NO2)
C C7H5N3O6
D C7H6N3O6
2 for more: tyrionpapers.com
*P75509RRRA0232*
, (ii) A bottle of this substance is labelled with the hazard symbol in Figure 2.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
Figure 2
State the danger associated with the contents of this bottle.
(1)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
(c) Yellow bananas emit ethene gas, C2H4 .
Draw one molecule of ethene, showing all covalent bonds.
(2)
(d) Gold has a yellow colour.
A gold nanosphere has a surface area of 305 nm2.
The surface area to volume ratio is 1 : 4.60.
Calculate the volume, in nm3, of the gold nanosphere.
(1)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
volume = ..................................................... . . . . . . . . . nm3
(Total for Question 1 = 6 marks)
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