Please write clearly in block capitals.
Centre number Candidate number INTERNATIONAL AS
Surname CHEMISTRY (9620)
Forename(s)
Candidate signature
CH01
I declare this is my own work.
Unit 1: Inorganic 1 and Physical 1
INTERNATIONAL AS Mark scheme
CHEMISTRY (9620) June 2026
Version: 1.0 Final
Unit 1: Inorganic 1 and Physical 1
Tuesday 28 April 2026 08:00 UK Time Time allowed: 1 hour 30 minutes
Materials
For this paper you must have: For Examiner’s Use
• the Periodic Table/Data Sheet, provided as an insert Question Mark
• a ruler with millimetre measurements
1
• a scientific calculator, which you are expected to use where appropriate.
2
Instructions 3
• Use black ink or black ball-point pen. 4
• Fill in the boxes at the top of this page.
• Answer all questions. 5
• You must answer the questions in the spaces provided. Do not write 6
outside the box around each page or on blank pages. 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 answer(s). TOTAL
• 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 70.
*JuN26CH0101*
IB/G/Jun26/G4006/V6 CH01
, 2
MARK SCHEME – INTERNATIONAL AS CHEMISTRY – CH01 – JUNE 2026
Do not write
outside the
Answer all questions in the spaces provided. box
Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant
questions, by a panel of subject teachers. This mark scheme includes any amendments made at the
0 1 This question is about some Group 2 elements and their compounds. standardisation events which all associates participate in and is the scheme which was used by them in
this examination. The standardisation process ensures that the mark scheme covers the students’
Magnesium and barium react with H2O under different conditions.
responses to questions and that every associate understands and applies it in the same correct way.
As preparation for standardisation each associate analyses a number of students’ scripts. Alternative
answers not already covered by the mark scheme are discussed and legislated for. If, after the
0 1 . 1 Magnesium reacts rapidly with H2O standardisation process, associates encounter unusual answers which have not been raised they are
required to refer these to the Lead Examiner.
State the conditions needed for this reaction.
It must be stressed that a mark scheme is a working document, in many cases further developed and
Give one observation. expanded on the basis of students’ reactions to a particular paper. Assumptions about future mark
schemes on the basis of one year’s document should be avoided; whilst the guiding principles of
Write an equation for this reaction. assessment remain constant, details will change, depending on the content of a particular examination
[3 marks] paper.
Conditions
Further copies of this mark scheme are available from
Observation
Equation
0 1 . 2 Write an equation, including state symbols, for the reaction of barium with H2O
[1 mark]
information
OxfordAQA retains the on all its publications. However, registered schools/colleges for OxfordAQA are permitted to copy material from this booklet for
their own internal use, llowing important exception: OxfordAQA cannot give permission to schools/colleges to photocopy any material that is
acknowledged to a third party even for internal use within the centre.
OxfordAQA International Examinations and its licensors. All rights reserved.
*02*
2
IB/G/Jun26/CH01
, 3
MARK SCHEME – INTERNATIONAL AS CHEMISTRY – CH01 – JUNE 2026
Do not write
outside the
0 1 . 3 A student uses dilute sulfuric acid to distinguish between an aqueous solution of box
magnesium chloride and an aqueous solution of barium chloride.
State the observation the student would make with each solution.
Write an ionic equation for any reaction(s) that give(s) a visible change.
[3 marks]
Observation with magnesium chloride
Observation with barium chloride
Ionic equation(s)
7
Turn over for the next question
Turn over ►
*03*
3
IB/G/Jun26/CH01
Centre number Candidate number INTERNATIONAL AS
Surname CHEMISTRY (9620)
Forename(s)
Candidate signature
CH01
I declare this is my own work.
Unit 1: Inorganic 1 and Physical 1
INTERNATIONAL AS Mark scheme
CHEMISTRY (9620) June 2026
Version: 1.0 Final
Unit 1: Inorganic 1 and Physical 1
Tuesday 28 April 2026 08:00 UK Time Time allowed: 1 hour 30 minutes
Materials
For this paper you must have: For Examiner’s Use
• the Periodic Table/Data Sheet, provided as an insert Question Mark
• a ruler with millimetre measurements
1
• a scientific calculator, which you are expected to use where appropriate.
2
Instructions 3
• Use black ink or black ball-point pen. 4
• Fill in the boxes at the top of this page.
• Answer all questions. 5
• You must answer the questions in the spaces provided. Do not write 6
outside the box around each page or on blank pages. 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 answer(s). TOTAL
• 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 70.
*JuN26CH0101*
IB/G/Jun26/G4006/V6 CH01
, 2
MARK SCHEME – INTERNATIONAL AS CHEMISTRY – CH01 – JUNE 2026
Do not write
outside the
Answer all questions in the spaces provided. box
Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant
questions, by a panel of subject teachers. This mark scheme includes any amendments made at the
0 1 This question is about some Group 2 elements and their compounds. standardisation events which all associates participate in and is the scheme which was used by them in
this examination. The standardisation process ensures that the mark scheme covers the students’
Magnesium and barium react with H2O under different conditions.
responses to questions and that every associate understands and applies it in the same correct way.
As preparation for standardisation each associate analyses a number of students’ scripts. Alternative
answers not already covered by the mark scheme are discussed and legislated for. If, after the
0 1 . 1 Magnesium reacts rapidly with H2O standardisation process, associates encounter unusual answers which have not been raised they are
required to refer these to the Lead Examiner.
State the conditions needed for this reaction.
It must be stressed that a mark scheme is a working document, in many cases further developed and
Give one observation. expanded on the basis of students’ reactions to a particular paper. Assumptions about future mark
schemes on the basis of one year’s document should be avoided; whilst the guiding principles of
Write an equation for this reaction. assessment remain constant, details will change, depending on the content of a particular examination
[3 marks] paper.
Conditions
Further copies of this mark scheme are available from
Observation
Equation
0 1 . 2 Write an equation, including state symbols, for the reaction of barium with H2O
[1 mark]
information
OxfordAQA retains the on all its publications. However, registered schools/colleges for OxfordAQA are permitted to copy material from this booklet for
their own internal use, llowing important exception: OxfordAQA cannot give permission to schools/colleges to photocopy any material that is
acknowledged to a third party even for internal use within the centre.
OxfordAQA International Examinations and its licensors. All rights reserved.
*02*
2
IB/G/Jun26/CH01
, 3
MARK SCHEME – INTERNATIONAL AS CHEMISTRY – CH01 – JUNE 2026
Do not write
outside the
0 1 . 3 A student uses dilute sulfuric acid to distinguish between an aqueous solution of box
magnesium chloride and an aqueous solution of barium chloride.
State the observation the student would make with each solution.
Write an ionic equation for any reaction(s) that give(s) a visible change.
[3 marks]
Observation with magnesium chloride
Observation with barium chloride
Ionic equation(s)
7
Turn over for the next question
Turn over ►
*03*
3
IB/G/Jun26/CH01
