2025 OCR GCSE COMBINED SCIENCE A (GATEWAY SCIENCE)
J250/09 CHEMISTRY (HIGHER TIER)
Complete Question paper with Marking Scheme
Combined
Oxford Cambridge and RSA
Monday 19 May 2025 – Morning
GCSE (9–1) Combined Science A (Gateway Science)
J250/09 Chemistry (Higher Tier)
Time allowed: 1 hour 10 minutes
You must have:
• a ruler (cm/mm)
H
• the Data Sheet for GCSE (9–1) Combined
Science A (Chemistry) (inside this
document)
You can use:
• a scientific or graphical calculator
• an HB pencil
* J 2 5 00 9 *
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 60.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 20 pages.
ADVICE
• Read each question carefully before you start your answer.
,© OCR 2025 OCR is an exempt
[601/8687/2] DC Charity Turn over
(WW/SG)
353367/3
,
, 2
Section A
You should spend a maximum of 20 minutes on this section.
Write your answer to each question in the box provided.
1 Which statement describes a pure substance?
A A mixture of substances which melts at a single temperature.
B A mixture of substances which melts over a range of temperatures.
C One substance which melts at a single temperature.
D One substance which melts over a range of temperatures.
Your answer [1]
2 Which row describes the nucleus of an atom?
Charge Mass
A positive contains little of the mass of the atom
B positive contains most of the mass of the atom
C negative contains little of the mass of the atom
D neutral contains most of the mass of the atom
Your answer [1]
3 Which substance is made from rings of carbon atoms?
A Carbon monoxide
B Copper carbonate
C Graphene
D Poly(ethene)
Your answer [1]
© OCR 2025
J250/09 CHEMISTRY (HIGHER TIER)
Complete Question paper with Marking Scheme
Combined
Oxford Cambridge and RSA
Monday 19 May 2025 – Morning
GCSE (9–1) Combined Science A (Gateway Science)
J250/09 Chemistry (Higher Tier)
Time allowed: 1 hour 10 minutes
You must have:
• a ruler (cm/mm)
H
• the Data Sheet for GCSE (9–1) Combined
Science A (Chemistry) (inside this
document)
You can use:
• a scientific or graphical calculator
• an HB pencil
* J 2 5 00 9 *
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 60.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 20 pages.
ADVICE
• Read each question carefully before you start your answer.
,© OCR 2025 OCR is an exempt
[601/8687/2] DC Charity Turn over
(WW/SG)
353367/3
,
, 2
Section A
You should spend a maximum of 20 minutes on this section.
Write your answer to each question in the box provided.
1 Which statement describes a pure substance?
A A mixture of substances which melts at a single temperature.
B A mixture of substances which melts over a range of temperatures.
C One substance which melts at a single temperature.
D One substance which melts over a range of temperatures.
Your answer [1]
2 Which row describes the nucleus of an atom?
Charge Mass
A positive contains little of the mass of the atom
B positive contains most of the mass of the atom
C negative contains little of the mass of the atom
D neutral contains most of the mass of the atom
Your answer [1]
3 Which substance is made from rings of carbon atoms?
A Carbon monoxide
B Copper carbonate
C Graphene
D Poly(ethene)
Your answer [1]
© OCR 2025
