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 this paper you must have:
• the Periodic Table/Data Sheet, provided as an insert (enclosed) For Examiner’s Use
• a ruler with millimetre measurements Question Mark
• a scientific calculator, which you are expected to use where appropriate.
1
Instructions 2
• Use black ink or black ball-point pen. 3
• Fill in the boxes at the top of this page. 4
• Answer all questions.
5
• You must answer the questions in the spaces provided. Do not write outside
the box around each page or on blank pages. 6
• If you need extra space for your answer(s), use the lined pages at the end of 7
this book. Write the question number against your answer(s).
Section B
• All working must be shown.
• Do all rough work in this book. Cross through any work you do not TOTAL
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*
IB/M/Jun25/G4002/V6 7404/1
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
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]
*02*
IB/M/Jun25/7404/1
, 3
Do not write
outside the
The second stage of the extraction is the reaction between TiCl4 and magnesium. box
0 1 . 3 Give the equation for the reaction between TiCl4 and magnesium.
State the role of magnesium in this reaction.
[2 marks]
Equation
Role of magnesium
0 1 . 4 Titanium is an expensive metal because its extraction process uses magnesium.
Suggest why magnesium is expensive.
[1 mark]
6
Turn over for the next question
Turn over ►
*03*
IB/M/Jun25/7404/1
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 this paper you must have:
• the Periodic Table/Data Sheet, provided as an insert (enclosed) For Examiner’s Use
• a ruler with millimetre measurements Question Mark
• a scientific calculator, which you are expected to use where appropriate.
1
Instructions 2
• Use black ink or black ball-point pen. 3
• Fill in the boxes at the top of this page. 4
• Answer all questions.
5
• You must answer the questions in the spaces provided. Do not write outside
the box around each page or on blank pages. 6
• If you need extra space for your answer(s), use the lined pages at the end of 7
this book. Write the question number against your answer(s).
Section B
• All working must be shown.
• Do all rough work in this book. Cross through any work you do not TOTAL
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*
IB/M/Jun25/G4002/V6 7404/1
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
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]
*02*
IB/M/Jun25/7404/1
, 3
Do not write
outside the
The second stage of the extraction is the reaction between TiCl4 and magnesium. box
0 1 . 3 Give the equation for the reaction between TiCl4 and magnesium.
State the role of magnesium in this reaction.
[2 marks]
Equation
Role of magnesium
0 1 . 4 Titanium is an expensive metal because its extraction process uses magnesium.
Suggest why magnesium is expensive.
[1 mark]
6
Turn over for the next question
Turn over ►
*03*
IB/M/Jun25/7404/1
