OCR SUMMER 2026
PREDICTED PAPER
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 Science
A (Chemistry) (inside this document)
You can use:
a scientific or graphical calculator
• an HB pencil
F
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 16 pages.
ADVICE
• Read each question carefully before you start your answer.
Turn over
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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 of the following correctly describes the arrangement and movement of particles
in a liquid?
A Regular arrangement; vibrate about a fixed position
B Random arrangement; move quickly in all directions
C Random arrangement; move around each other
D Regular arrangement; move around each other
Your answer [1]
2. Which statement about isotopes is correct?
A They have different numbers of protons but the same number of neutrons
B They have the same number of protons but different numbers of neutrons
C They have different chemical properties from each other
D They have the same mass number but different atomic numbers
Your answer [1]
3. The molecular formula of a compound is C₄H₁₀.
What is its empirical formula?
A C₄H₁₀
B C₂H₅
C CH₄
D C₂H₁₀
Your answer [1]
for more: tyrionpapers.com
, 3
4. What is the relative formula mass (Mr) of calcium carbonate, CaCO₃?
(Ca = 40, C = 12, O = 16)
A 68
B 84
C 100
D 116
Your answer [1]
5.A substance has a melting point of −78 °C and a boiling point of −34 °C.
What is its physical state at −50 °C?
A Solid
B Liquid
C Gas
D Cannot be determined
Your answer [1]
6.Which statement about metallic bonding is correct?
A Metals form negative ions surrounded by a sea of protons
B Delocalised electrons allow metals to conduct electricity
C Metal atoms share electrons in pairs forming covalent bonds
D Metals conduct electricity because ions are free to move
Your answer [1]
for more: tyrionpapers.com
PREDICTED PAPER
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 Science
A (Chemistry) (inside this document)
You can use:
a scientific or graphical calculator
• an HB pencil
F
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 16 pages.
ADVICE
• Read each question carefully before you start your answer.
Turn over
for more: tyrionpapers.com
, 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 of the following correctly describes the arrangement and movement of particles
in a liquid?
A Regular arrangement; vibrate about a fixed position
B Random arrangement; move quickly in all directions
C Random arrangement; move around each other
D Regular arrangement; move around each other
Your answer [1]
2. Which statement about isotopes is correct?
A They have different numbers of protons but the same number of neutrons
B They have the same number of protons but different numbers of neutrons
C They have different chemical properties from each other
D They have the same mass number but different atomic numbers
Your answer [1]
3. The molecular formula of a compound is C₄H₁₀.
What is its empirical formula?
A C₄H₁₀
B C₂H₅
C CH₄
D C₂H₁₀
Your answer [1]
for more: tyrionpapers.com
, 3
4. What is the relative formula mass (Mr) of calcium carbonate, CaCO₃?
(Ca = 40, C = 12, O = 16)
A 68
B 84
C 100
D 116
Your answer [1]
5.A substance has a melting point of −78 °C and a boiling point of −34 °C.
What is its physical state at −50 °C?
A Solid
B Liquid
C Gas
D Cannot be determined
Your answer [1]
6.Which statement about metallic bonding is correct?
A Metals form negative ions surrounded by a sea of protons
B Delocalised electrons allow metals to conduct electricity
C Metal atoms share electrons in pairs forming covalent bonds
D Metals conduct electricity because ions are free to move
Your answer [1]
for more: tyrionpapers.com
