AS
CHEMISTRY ACTUAL 2025 PAPER MERGED
WITH MARK SCHEME
Paper 1 Inorganic and Physical Chemistry
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
CHEMISTRY
Paper 1 Inorganic and Physical Chemistry
Tuesday 13 May 2025 Morning Time allowed: 1 hour 30 minutes
Materials
For Examiner’s Use
Question Mark
1
2
3
, 2
Do not write
outside the
box
For this paper you must have: 4
• the Periodic Table/Data Sheet, provided as an insert (enclosed)
• a ruler with millimetre measurements 5
• a scientific calculator, which you are expected to use where appropriate.
6
Instructions
7
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page. Section B
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write outside TOTAL
the box around each page or on blank pages.
• 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).
• All working must be shown.
• Do all rough work in this book. Cross through any work you do not want to be marked.
Information
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 80.
Advice
• You are advised to spend 65 minutes on Section A and 25 minutes on Section B.
*Jun257404101* tyrionpapers.com 7404/1
IB/M/Jun25/G4002/V6
Section A
Answer all questions in this section.
tyrionpapers.com
IB/M/Jun25/7404/1
, 3
Do not write outside the
box
0 1 This question is about the extraction of titanium.
The first stage in the extraction of titanium is the formation of titanium(IV)
chloride, TiCl4
TiO2(s) + 2 C(s) + 2 Cl2(g) ⟶ TiCl4(l) + 2 CO(g)
0 1 .1 Calculate the percentage atom economy to form TiCl4 in this first stage of the
extraction.
[2 marks]
Percentage atom economy
0 1
.2 Suggest one economic advantage of using a process with a
high percentage atom economy.
[1 mark]
Turn over ►
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IB/M/Jun25/7404/1
, 4
Do not write
outside the
box
*02*
tyrionpapers.com
IB/M/Jun25/7404/1
CHEMISTRY ACTUAL 2025 PAPER MERGED
WITH MARK SCHEME
Paper 1 Inorganic and Physical Chemistry
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
CHEMISTRY
Paper 1 Inorganic and Physical Chemistry
Tuesday 13 May 2025 Morning Time allowed: 1 hour 30 minutes
Materials
For Examiner’s Use
Question Mark
1
2
3
, 2
Do not write
outside the
box
For this paper you must have: 4
• the Periodic Table/Data Sheet, provided as an insert (enclosed)
• a ruler with millimetre measurements 5
• a scientific calculator, which you are expected to use where appropriate.
6
Instructions
7
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page. Section B
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write outside TOTAL
the box around each page or on blank pages.
• 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).
• All working must be shown.
• Do all rough work in this book. Cross through any work you do not want to be marked.
Information
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 80.
Advice
• You are advised to spend 65 minutes on Section A and 25 minutes on Section B.
*Jun257404101* tyrionpapers.com 7404/1
IB/M/Jun25/G4002/V6
Section A
Answer all questions in this section.
tyrionpapers.com
IB/M/Jun25/7404/1
, 3
Do not write outside the
box
0 1 This question is about the extraction of titanium.
The first stage in the extraction of titanium is the formation of titanium(IV)
chloride, TiCl4
TiO2(s) + 2 C(s) + 2 Cl2(g) ⟶ TiCl4(l) + 2 CO(g)
0 1 .1 Calculate the percentage atom economy to form TiCl4 in this first stage of the
extraction.
[2 marks]
Percentage atom economy
0 1
.2 Suggest one economic advantage of using a process with a
high percentage atom economy.
[1 mark]
Turn over ►
tyrionpapers.com
IB/M/Jun25/7404/1
, 4
Do not write
outside the
box
*02*
tyrionpapers.com
IB/M/Jun25/7404/1
