MARK SCHEME
OCR A Level Chemistry A
H432/03 · Unified chemistry
June 2026
What this document contains
· Full mark scheme (26 pages)
· A Level Chemistry A
· H432/03: Unified chemistry
· June 2026
· Exam-style marking guidance for revision
,GCE
Chemistry A
H432/03: Unified chemistry
A Level
Mark Scheme for June 2026
, Cambridge OCR is a leading UK awarding body, providing a wide range of qualifications to
meet the needs of candidates of all ages and abilities. Cambridge OCR qualifications include
AS/A Levels, Diplomas, GCSEs, Cambridge Nationals, Cambridge Technicals, Functional Skills,
Key Skills, Entry Level qualifications, NVQs and vocational qualifications in areas such as IT,
business, languages, teaching/training, administration and secretarial skills.
It is also responsible for developing new specifications to meet national requirements and the
needs of students and teachers. Cambridge OCR is a not-for-profit organisation; any surplus
made is invested back into the establishment to help towards the development of qualifications
and support, which keep pace with the changing needs of today’s society.
This mark scheme is published as an aid to teachers and students, to indicate the requirements
of the examination. It shows the basis on which marks were awarded by examiners. It does not
indicate the details of the discussions which took place at an examiners’ meeting before marking
commenced.
All examiners are instructed that alternative correct answers and unexpected approaches in
candidates’ scripts must be given marks that fairly reflect the relevant knowledge and skills
demonstrated.
Mark schemes should be read in conjunction with the published question papers and the report
on the examination.
© Cambridge OCR 2026
OCR A Level Chemistry A
H432/03 · Unified chemistry
June 2026
What this document contains
· Full mark scheme (26 pages)
· A Level Chemistry A
· H432/03: Unified chemistry
· June 2026
· Exam-style marking guidance for revision
,GCE
Chemistry A
H432/03: Unified chemistry
A Level
Mark Scheme for June 2026
, Cambridge OCR is a leading UK awarding body, providing a wide range of qualifications to
meet the needs of candidates of all ages and abilities. Cambridge OCR qualifications include
AS/A Levels, Diplomas, GCSEs, Cambridge Nationals, Cambridge Technicals, Functional Skills,
Key Skills, Entry Level qualifications, NVQs and vocational qualifications in areas such as IT,
business, languages, teaching/training, administration and secretarial skills.
It is also responsible for developing new specifications to meet national requirements and the
needs of students and teachers. Cambridge OCR is a not-for-profit organisation; any surplus
made is invested back into the establishment to help towards the development of qualifications
and support, which keep pace with the changing needs of today’s society.
This mark scheme is published as an aid to teachers and students, to indicate the requirements
of the examination. It shows the basis on which marks were awarded by examiners. It does not
indicate the details of the discussions which took place at an examiners’ meeting before marking
commenced.
All examiners are instructed that alternative correct answers and unexpected approaches in
candidates’ scripts must be given marks that fairly reflect the relevant knowledge and skills
demonstrated.
Mark schemes should be read in conjunction with the published question papers and the report
on the examination.
© Cambridge OCR 2026
