2025 OCR GCSE (9–1) Combined Science A (Gateway Science) J250/09 Chemistry (Higher Tier)
Combined Question Paper & Final Marking Scheme
Oxford Cambridge and RSA
Monday 19 May 2025 – Morning
GCSE (9–1) Combined Science A
(Gateway Science)
J250/09 Chemistry (Higher Tier)
*1862637756*
Time allowed: 1 hour 10 minutes
You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9–1) Combined Science A
H
(Chemistry) (inside this document)
You can use:
• a scientific or graphical calculator
• an HB pencil
* J 2 5 0 0 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 [601/8687/2] OCR is an exempt Charity
DC (WW/SG) 353367/3 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 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
, 3
4 The diagram shows a chemical reaction.
Balance
162.2 g
During the reaction the mass on the balance decreases.
Which state symbol describes the product that causes the mass to decrease?
A aq
B g
C l
D s
Your answer [1]
5 Which statement about how Mendeleev arranged his version of the Periodic Table is incorrect?
A He arranged elements in order of atomic number.
B He arranged elements with similar properties in groups.
C He left gaps for undiscovered elements.
D He swapped the order of pairs of some elements.
Your answer [1]
6 Which of these is a cation?
A Cl –
B He
C I2
D Na+
Your answer [1]
© OCR 2025 Turn over
, 4
7 A student performs a chromatography experiment on a mixture of dyes.
The solvent moves 8.0 cm up the chromatography paper.
The Rf value for one dye is 0.60.
What distance does this dye move up the chromatography paper?
A 4.0 cm
B 4.8 cm
C 6.0 cm
D 7.2 cm
Your answer [1]
8 The reaction of iron, Fe, with copper ions, Cu2+, can be written as two half equations.
Fe Fe2+ + 2e–
Cu2+ + 2e– Cu
Which species is oxidised?
A Cu
B Fe
C Cu2+
D Fe2+
Your answer [1]
9 The particle model is used to describe changes of state.
Which statement about the particle model is correct?
A It takes into account the forces between particles.
B It takes into account the size of the particles.
C It takes into account the space between the particles.
D It represents the particles as inelastic spheres.
Your answer [1]
© OCR 2025
Combined Question Paper & Final Marking Scheme
Oxford Cambridge and RSA
Monday 19 May 2025 – Morning
GCSE (9–1) Combined Science A
(Gateway Science)
J250/09 Chemistry (Higher Tier)
*1862637756*
Time allowed: 1 hour 10 minutes
You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9–1) Combined Science A
H
(Chemistry) (inside this document)
You can use:
• a scientific or graphical calculator
• an HB pencil
* J 2 5 0 0 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 [601/8687/2] OCR is an exempt Charity
DC (WW/SG) 353367/3 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 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
, 3
4 The diagram shows a chemical reaction.
Balance
162.2 g
During the reaction the mass on the balance decreases.
Which state symbol describes the product that causes the mass to decrease?
A aq
B g
C l
D s
Your answer [1]
5 Which statement about how Mendeleev arranged his version of the Periodic Table is incorrect?
A He arranged elements in order of atomic number.
B He arranged elements with similar properties in groups.
C He left gaps for undiscovered elements.
D He swapped the order of pairs of some elements.
Your answer [1]
6 Which of these is a cation?
A Cl –
B He
C I2
D Na+
Your answer [1]
© OCR 2025 Turn over
, 4
7 A student performs a chromatography experiment on a mixture of dyes.
The solvent moves 8.0 cm up the chromatography paper.
The Rf value for one dye is 0.60.
What distance does this dye move up the chromatography paper?
A 4.0 cm
B 4.8 cm
C 6.0 cm
D 7.2 cm
Your answer [1]
8 The reaction of iron, Fe, with copper ions, Cu2+, can be written as two half equations.
Fe Fe2+ + 2e–
Cu2+ + 2e– Cu
Which species is oxidised?
A Cu
B Fe
C Cu2+
D Fe2+
Your answer [1]
9 The particle model is used to describe changes of state.
Which statement about the particle model is correct?
A It takes into account the forces between particles.
B It takes into account the size of the particles.
C It takes into account the space between the particles.
D It represents the particles as inelastic spheres.
Your answer [1]
© OCR 2025
