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May Bu
20
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.
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AGCSE
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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]
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AGCSE
(Gateway
GCSEPackage
Combined
Science) J250-03
Science Chemistry
A (Gateway(Foundation
Deal | Complete Science)
Exam Page J250-03
Tier)
3 Complete
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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
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]
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May 2025 Mo-c
OCR GCSE UK.STUDIES//2025
Combined Science
_2025//2026 OCR OCR
AGCSE
(Gateway
GCSEPackage
Combined
Science) J250-03
Science Chemistry
A (Gateway(Foundation
Deal | Complete Science)
Exam Page J250-03
Tier)
4 Complete
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May Bu
20
4
5 Methane reacts with oxygen to make carbon dioxide and water.
CH4 + 2O2 CO2 + 2H2O
Which chemical is being oxidised?
A CH4
B CO2
C H2O
D O2
Your answer [1]
6 Which type of mixture can be separated using paper chromatography?
A A mixture of gases.
B A mixture of insoluble liquids.
C A mixture of insoluble solids.
D A mixture of soluble liquids.
Your answer [1]
7 Which particle in dilute hydrochloric acid, HCl, makes it acidic?
A Cl –
B H+
C H2O
D OH–
Your answer [1]
© OCR 2025
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A (Gateway
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Science
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J250-03
(Gateway
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Science)
Complete
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Scheme19Combined
May 2025 Mo-c
OCR GCSE UK.STUDIES//2025
Combined Science
_2025//2026 OCR OCR
AGCSE
(Gateway
GCSEPackage
Combined
Science) J250-03
Science Chemistry
A (Gateway(Foundation
Deal | Complete Science)
Exam Page J250-03
Tier)
1 Complete
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Complete
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Question
Combined
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1 of 43
Higher 119Tier
Scheme
May Bu
20
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
mbined Science
Download the DC
A (Gateway (DE/JG)
2025 353358/4
Science)
OCR GSCE:
J250-03
question
Chemistry
paper,
(Foundation
including the
Tier)
complete
Complete
Page Question
1Question
of 43 Paper
paperwithwith
Exam-Ready
Marking Scheme
Examiner
Combined
Mark Scheme.Turn
Monday 19 over
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Mayall2025.pdf
examinable cont
GCSE Combined
2025 OCR
Science
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4/28/2026
19Combined
May 2025 Mo
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nce A (Gateway
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Monday
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- converted.pdf
Scheme19Combined
May 2025 Mo-c
OCR GCSE UK.STUDIES//2025
Combined Science
_2025//2026 OCR OCR
AGCSE
(Gateway
GCSEPackage
Combined
Science) J250-03
Science Chemistry
A (Gateway(Foundation
Deal | Complete Science)
Exam Page J250-03
Tier)
2 Complete
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Complete
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Combined
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&Monday
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2 of 43
Higher 219Tier
Scheme
May Bu
20
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
mbined Science
Download
A (Gateway
the 2025Science)
OCR GSCE:
J250-03
question
Chemistry
paper,
(Foundation
including the
Tier)
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Complete
PageQuestion
2Question
of 43 Paper
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withwith
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GCSE Combined
2025 OCR
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Science A
J250-03
(Gateway
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(Foundation
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Tier) Complete
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paper
Complete
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Monday
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4/28/2026
19Combined
May 2025 Mo
-c
,GCSE
nce A (Gateway
Combined
2025 OCR
Science)
Science
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J250-03
(Gateway
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Complete
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Monday
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- converted.pdf
Scheme19Combined
May 2025 Mo-c
OCR GCSE UK.STUDIES//2025
Combined Science
_2025//2026 OCR OCR
AGCSE
(Gateway
GCSEPackage
Combined
Science) J250-03
Science Chemistry
A (Gateway(Foundation
Deal | Complete Science)
Exam Page J250-03
Tier)
3 Complete
Question Chemistry
PapersQuestion
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paperTier)
with MarkingwithSchemes,
Complete
Marking Scheme
Question
Combined
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Foundation with
&Monday
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3 of 43
Higher 319Tier
Scheme
May Bu
20
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
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 2025 Turn over
mbined Science
Download
A (Gateway
the 2025Science)
OCR GSCE:
J250-03
question
Chemistry
paper,
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including the
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PageQuestion
3Question
of 43 Paper
paper
withwith
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2025 OCR
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Science A
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19Combined
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-c
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nce A (Gateway
Combined
2025 OCR
Science)
Science
GCSE A
J250-03
(Gateway
Combined
Chemistry
Science)
Science
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A
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Science)
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Monday
Scheme
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MayMarking
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- converted.pdf
Scheme19Combined
May 2025 Mo-c
OCR GCSE UK.STUDIES//2025
Combined Science
_2025//2026 OCR OCR
AGCSE
(Gateway
GCSEPackage
Combined
Science) J250-03
Science Chemistry
A (Gateway(Foundation
Deal | Complete Science)
Exam Page J250-03
Tier)
4 Complete
Question Chemistry
PapersQuestion
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paperTier)
with MarkingwithSchemes,
Complete
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Question
Combined
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Foundation with
&Monday
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4 of 43
Higher 419Tier
Scheme
May Bu
20
4
5 Methane reacts with oxygen to make carbon dioxide and water.
CH4 + 2O2 CO2 + 2H2O
Which chemical is being oxidised?
A CH4
B CO2
C H2O
D O2
Your answer [1]
6 Which type of mixture can be separated using paper chromatography?
A A mixture of gases.
B A mixture of insoluble liquids.
C A mixture of insoluble solids.
D A mixture of soluble liquids.
Your answer [1]
7 Which particle in dilute hydrochloric acid, HCl, makes it acidic?
A Cl –
B H+
C H2O
D OH–
Your answer [1]
© OCR 2025
mbined Science
Download
A (Gateway
the 2025Science)
OCR GSCE:
J250-03
question
Chemistry
paper,
(Foundation
including the
Tier)
complete
Complete
PageQuestion
4Question
of 43 Paper
paper
withwith
Exam-Ready
Marking Scheme
Examiner
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MondayCovers
19 Mayall2025.pdf
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GCSE Combined
2025 OCR
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GCSEA (Gateway
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Science A
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(Gateway
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(Foundation
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Tier) Complete
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paper
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19Combined
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