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 2H
Friday 13 June 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. TOTAL
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
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/E7
8464/C/2H
, 2
Do not write
outside the
0 1 Dodecane is an box
alkane.
0 1 . The general formula for alkanes is
1 CnH2n+2
A molecule of dodecane has 12 carbon
atoms. Complete the formula of [1 mark]
dodecane.
C H
A student investigated the effect of changing the temperature on
the viscosity of dodecane.
Figure 1 shows the apparatus.
Figure 1
IB/M/Jun25/8464/C/
2H
, 3
Do not write
outside the
This is the method used. box
1. Add 100 cm3 of dodecane at 25 °C to the cup.
2. Immediately start a timer.
3.Stop the timer when 40 cm3 of dodecane has been
collected in the measuring cylinder.
4. Record the time taken.
5. Repeat steps 1 to 4 using dodecane at different
temperatures.
0 1 .2 The student used a water bath to heat the dodecane.
Suggest one reason why the student used a water bath instead of a Bunsen
burner to heat the dodecane.
[1 mark]
0 1 .3 Give one control variable used in the
investigation. [1 mark]
Question 1 continues on the next page
IB/M/Jun25/8464/C/
2H
, 4
Do not write
outside the
Turn over ►
IB/M/Jun25/8464/C/
2H
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 2H
Friday 13 June 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. TOTAL
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
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/E7
8464/C/2H
, 2
Do not write
outside the
0 1 Dodecane is an box
alkane.
0 1 . The general formula for alkanes is
1 CnH2n+2
A molecule of dodecane has 12 carbon
atoms. Complete the formula of [1 mark]
dodecane.
C H
A student investigated the effect of changing the temperature on
the viscosity of dodecane.
Figure 1 shows the apparatus.
Figure 1
IB/M/Jun25/8464/C/
2H
, 3
Do not write
outside the
This is the method used. box
1. Add 100 cm3 of dodecane at 25 °C to the cup.
2. Immediately start a timer.
3.Stop the timer when 40 cm3 of dodecane has been
collected in the measuring cylinder.
4. Record the time taken.
5. Repeat steps 1 to 4 using dodecane at different
temperatures.
0 1 .2 The student used a water bath to heat the dodecane.
Suggest one reason why the student used a water bath instead of a Bunsen
burner to heat the dodecane.
[1 mark]
0 1 .3 Give one control variable used in the
investigation. [1 mark]
Question 1 continues on the next page
IB/M/Jun25/8464/C/
2H
, 4
Do not write
outside the
Turn over ►
IB/M/Jun25/8464/C/
2H
