Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
GCSE
COMBINED SCIENCE: TRILOGY
Higher Tier
H
Chemistry Paper 1H
Monday 19 May 2025 Morning Time allowed: 1 hour 15 minutes
Materials For Examiner’s Use
For this paper you must have:
Question Mark
a ruler
a scientific calculator 1
the periodic table (enclosed). 2
3
Instructions
4
Use black ink or black ball-point pen.
Pencil should only be used for drawing. 5
Fill in the boxes at the top of this page. 6
Answer all questions in the spaces provided. 7
If you need extra space for your answer(s), use the lined pages at
the end of this book. Write the question number against your TOTAL
answer(s).
Do all rough work in this book. Cross through any work you do not
want to be marked.
In all calculations, show clearly how you work out your answer.
Information
The maximum mark for this paper is 70.
The marks for questions are shown in brackets.
You are expected to use a calculator where appropriate.
You are reminded of the need for good English and clear presentation in your answers.
IB/M/Jun25/G4007/E8
8464/C/1H
, 2
Do not write
outside the
There are no questions printed on this page box
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
IB/M/Jun25/8464/C/
1H
, 3
Do not write
outside the
0 1 A teacher demonstrated the electrolysis of copper chloride box
solution.
Figure 1 shows the apparatus.
Figure 1
The teacher measured the mass of the negative electrode every 60
seconds.
0 1 .1 Chlorine gas is given off during the electrolysis of copper
chloride solution. Chlorine gas is poisonous.
Give one way of reducing the risk of harm.
[1 mark]
Question 1 continues on the next page
IB/M/Jun25/8464/C/
1H
, 4
Do not write
outside the
Turn over ►
IB/M/Jun25/8464/C/
1H
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
GCSE
COMBINED SCIENCE: TRILOGY
Higher Tier
H
Chemistry Paper 1H
Monday 19 May 2025 Morning Time allowed: 1 hour 15 minutes
Materials For Examiner’s Use
For this paper you must have:
Question Mark
a ruler
a scientific calculator 1
the periodic table (enclosed). 2
3
Instructions
4
Use black ink or black ball-point pen.
Pencil should only be used for drawing. 5
Fill in the boxes at the top of this page. 6
Answer all questions in the spaces provided. 7
If you need extra space for your answer(s), use the lined pages at
the end of this book. Write the question number against your TOTAL
answer(s).
Do all rough work in this book. Cross through any work you do not
want to be marked.
In all calculations, show clearly how you work out your answer.
Information
The maximum mark for this paper is 70.
The marks for questions are shown in brackets.
You are expected to use a calculator where appropriate.
You are reminded of the need for good English and clear presentation in your answers.
IB/M/Jun25/G4007/E8
8464/C/1H
, 2
Do not write
outside the
There are no questions printed on this page box
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
IB/M/Jun25/8464/C/
1H
, 3
Do not write
outside the
0 1 A teacher demonstrated the electrolysis of copper chloride box
solution.
Figure 1 shows the apparatus.
Figure 1
The teacher measured the mass of the negative electrode every 60
seconds.
0 1 .1 Chlorine gas is given off during the electrolysis of copper
chloride solution. Chlorine gas is poisonous.
Give one way of reducing the risk of harm.
[1 mark]
Question 1 continues on the next page
IB/M/Jun25/8464/C/
1H
, 4
Do not write
outside the
Turn over ►
IB/M/Jun25/8464/C/
1H
