Changes

*[[https://www.ocr.org.uk/Images/234640-unit-j250-03-chemistry-foundation-tier-paper-3-sample-assessment-material.pdf GCSE Chemistry OCR Gateway Combined Science P1F Specimen]Question Paper and Mark Scheme]*[[https://www.ocr.org.uk/Images/234655-unit-j250-09-chemistry-higher-tier-paper-9-sample-assessment-material.pdf GCSE Chemistry OCR Gateway Combined Science P1H Specimen]Question Paper and Mark Scheme]*[[https://www.ocr.org.uk/Images/234641-unit-j250-04-chemistry-foundation-tier-paper-4-sample-assessment-material.pdf GCSE Chemistry OCR Gateway Combined Science P2F Specimen]Question Paper and Mark Scheme]*[[https://www.ocr.org.uk/Images/234656-unit-j250-10-chemistry-higher-tier-paper-10-sample-assessment-material.pdf GCSE Chemistry OCR Gateway Combined Science P2H Specimen]Question Paper and Mark Scheme]