2025 OCR GCSE Combined Science A (Gateway Science)
J250/03 Chemistry (Foundation Tier)
Complete Question paper with Marking Scheme Combined
Monday 19 May 2025 – Morning
GCSE (9–1) Combined Science A
(Gateway Science)
J250/03 Chemistry (Foundation Tier)
Time allowed: 1 hour 10 minutes
You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9–1) Combined
F
Science A (Chemistry) (inside this document)
You can use:
• a scientific or graphical calculator
• an HB penci
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 [601/8687/2]
OCR is an exempt Charity
DC (DE/JG) 353358/4
,Turn over
, 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 state of matter is shown in the diagram?
A A gas
B A liquid
C A solid
D A solution
Your answer [1]
2 24 g of magnesium reacts with oxygen to make 40 g of magnesium oxide.
What mass of magnesium oxide is made when 12 g of magnesium reacts?
A 20 g
B 24 g
C 36 g
D 40 g
Your answer [1]
© OCR
2025
, 3
3 What type of change is shown in the diagram?
+
Iron Sulfur Iron sulfide
A A change of state
B A chemical change
C A physical change
D A reversible change
Your answer [1]
4 The diagram shows a chemical reaction.
Balance
162.2 g
Why does the mass on the balance decrease during the reaction?
A A gas is produced.
B A liquid is produced.
C A solid is produced.
D A solution is produced.
Your answer [1]
© OCR Turn over
2025
J250/03 Chemistry (Foundation Tier)
Complete Question paper with Marking Scheme Combined
Monday 19 May 2025 – Morning
GCSE (9–1) Combined Science A
(Gateway Science)
J250/03 Chemistry (Foundation Tier)
Time allowed: 1 hour 10 minutes
You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9–1) Combined
F
Science A (Chemistry) (inside this document)
You can use:
• a scientific or graphical calculator
• an HB penci
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 [601/8687/2]
OCR is an exempt Charity
DC (DE/JG) 353358/4
,Turn over
, 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 state of matter is shown in the diagram?
A A gas
B A liquid
C A solid
D A solution
Your answer [1]
2 24 g of magnesium reacts with oxygen to make 40 g of magnesium oxide.
What mass of magnesium oxide is made when 12 g of magnesium reacts?
A 20 g
B 24 g
C 36 g
D 40 g
Your answer [1]
© OCR
2025
, 3
3 What type of change is shown in the diagram?
+
Iron Sulfur Iron sulfide
A A change of state
B A chemical change
C A physical change
D A reversible change
Your answer [1]
4 The diagram shows a chemical reaction.
Balance
162.2 g
Why does the mass on the balance decrease during the reaction?
A A gas is produced.
B A liquid is produced.
C A solid is produced.
D A solution is produced.
Your answer [1]
© OCR Turn over
2025
