Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
CHEMISTRY
Paper 1 Inorganic and Physical Chemistry
Tuesday 10 June 2025 Morning Time allowed: 2 hours
Materials
For this paper you must have: For Examiner’s Use
• the Periodic Table/Data Booklet, provided as an insert (enclosed)
• a ruler with millimetre measurements Question Mark
• a scientific calculator, which you are expected to use where appropriate. 1
2
Instructions
3
• Use black ink or black ball-point pen.
• 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
6
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 7
this book. Write the question number against your answer(s). 8
• All working must be shown.
TOTAL
• 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 105.
IB/M/Jun25/G4007/V8 7405/1
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 This question is about some Group 2 elements and their compounds.
0 1 . 1 Magnesium is reacted with titanium(IV) chloride to extract titanium metal.
Give the equation for this reaction.
State the role of magnesium in this reaction.
[2 marks]
Equation
Role of magnesium
0 1 . 2 Complete Table 1 by giving the formula of a suitable calcium compound for each use.
[2 marks]
Table 1
Use Formula of calcium compound
Decrease acidity of soil
Remove SO2 from flue gases in power stations
0 1 . 3 Magnesium hydroxide is used to relieve the symptoms of indigestion by neutralising
stomach acid.
Suggest why magnesium hydroxide is safer than sodium hydroxide as a treatment for
indigestion.
[1 mark]
IB/M/Jun25/7405/1
, 3
Do not write
outside the
An ionic compound of a Group 2 element dissolves in water to form solution X. box
Separate samples of solution X are tested to identify the ions.
Table 2 shows the observations.
Table 2
Reagent added Observation
Test 1 NaOH(aq) White precipitate
Test 2 HNO3(aq) and AgNO3(aq) Cream precipitate
0 1 . 4 Identify the Group 2 cation in solution X.
Give an ionic equation for the reaction that occurs in Test 1.
[2 marks]
Group 2 cation
Ionic equation
Question 1 continues on the next page
Turn over ►
IB/M/Jun25/7405/1
, 4
Do not write
outside the
0 1 . 5 Identify the anion in solution X. box
Give an ionic equation, including state symbols, for the reaction that occurs in Test 2.
Explain why AgNO3(aq) is acidified.
[3 marks]
Anion
Ionic equation
Explanation
0 1 . 6 Give one property of barium sulfate that makes it useful in hospitals.
[1 mark]
11
IB/M/Jun25/7405/1
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
CHEMISTRY
Paper 1 Inorganic and Physical Chemistry
Tuesday 10 June 2025 Morning Time allowed: 2 hours
Materials
For this paper you must have: For Examiner’s Use
• the Periodic Table/Data Booklet, provided as an insert (enclosed)
• a ruler with millimetre measurements Question Mark
• a scientific calculator, which you are expected to use where appropriate. 1
2
Instructions
3
• Use black ink or black ball-point pen.
• 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
6
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 7
this book. Write the question number against your answer(s). 8
• All working must be shown.
TOTAL
• 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 105.
IB/M/Jun25/G4007/V8 7405/1
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 This question is about some Group 2 elements and their compounds.
0 1 . 1 Magnesium is reacted with titanium(IV) chloride to extract titanium metal.
Give the equation for this reaction.
State the role of magnesium in this reaction.
[2 marks]
Equation
Role of magnesium
0 1 . 2 Complete Table 1 by giving the formula of a suitable calcium compound for each use.
[2 marks]
Table 1
Use Formula of calcium compound
Decrease acidity of soil
Remove SO2 from flue gases in power stations
0 1 . 3 Magnesium hydroxide is used to relieve the symptoms of indigestion by neutralising
stomach acid.
Suggest why magnesium hydroxide is safer than sodium hydroxide as a treatment for
indigestion.
[1 mark]
IB/M/Jun25/7405/1
, 3
Do not write
outside the
An ionic compound of a Group 2 element dissolves in water to form solution X. box
Separate samples of solution X are tested to identify the ions.
Table 2 shows the observations.
Table 2
Reagent added Observation
Test 1 NaOH(aq) White precipitate
Test 2 HNO3(aq) and AgNO3(aq) Cream precipitate
0 1 . 4 Identify the Group 2 cation in solution X.
Give an ionic equation for the reaction that occurs in Test 1.
[2 marks]
Group 2 cation
Ionic equation
Question 1 continues on the next page
Turn over ►
IB/M/Jun25/7405/1
, 4
Do not write
outside the
0 1 . 5 Identify the anion in solution X. box
Give an ionic equation, including state symbols, for the reaction that occurs in Test 2.
Explain why AgNO3(aq) is acidified.
[3 marks]
Anion
Ionic equation
Explanation
0 1 . 6 Give one property of barium sulfate that makes it useful in hospitals.
[1 mark]
11
IB/M/Jun25/7405/1
