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OCR GCSE Chemistry B (Foundation Tier) – Paper 1 Mark Scheme (J258/01) – 2025
This mark scheme provides the official marking guidance for Paper 1 of the OCR GCSE Chemistry B (9–1) Foundation Tier examination, clearly showing how marks are awarded and what examiners expect from student responses.
It includes:
Clear marking points for every question
Acceptable answers and alternative wording suitable for Foundation Tier
Guidance for simple calculations, including method and final marks
Support for data interpretation and practical-based questions
Examiner notes explaining common mistakes and how marks are credited
The mark scheme aligns fully with Paper 1 content, covering fundamental chemical concepts, atomic structure, bonding, simple reactions, acids and alkalis, and energy changes, ensuring accurate and consistent marking.
This resource is ideal for teachers, tutors, and students, supporting:
Marking mock exams accurately
Understanding examiner expectations
Improving exam technique
Building confidence with Foundation Tier chemistry answers
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