Oxford Cambridge and RSA
Examinations Foundation
GCSECombined Science Chemistry A
Gateway ScienceJ250/03: Paper 3
(Foundation Tier) General Certificate
of Secondary Education with marking
scheme
, Oxford Cambridge and RSA
Monday 22 May 2023 – Morning
GCSE (9–1) Combined Science
(Chemistry) A (Gateway Science)
J250/03 Paper 3 (Foundation Tier)
Time allowed: 1 hour 10 minutes
F
* 9 1 3 2 2 6 8 2 8 6 *
You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9–1) Combined Science
(Chemistry) A (inside this document)
You can use:
• a scientific or graphical calculator
• an HB pencil
* J 2 5 0 0 3 *
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 2023 [601/8687/2] OCR is an exempt Charity
DC (ST/CB) 301263/7 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 What is the part of the atom labelled X called?
X
A Core
B Ion
C Nucleus
D Shell
Your answer [1]
2 The table shows the properties of four different substances.
Which substance is a metal?
Appearance at Melting point and
Substance Conducts heat?
room temperature boiling point
A green gas low no
B colourless solid high no
C shiny red-orange solid high yes
D white solid high no
Your answer [1]
© OCR 2023
, 3
3 Which is an example of a neutralisation reaction?
A A metal reacting with an acid
B A non-metal reacting with oxygen
C A salt dissolving in water
D An acid reacting with an alkali
Your answer [1]
4 Lead has a melting point of 328 °C. Mercury has a melting point of –39 °C.
Which row describes the state of lead and mercury at 100 °C?
State of lead State of mercury
A liquid liquid
B liquid solid
C solid liquid
D solid solid
Your answer [1]
5 Which element forms compounds with covalent molecules consisting of chains and rings?
A Argon
B Carbon
C Hydrogen
D Oxygen
Your answer [1]
© OCR 2023 Turn over
Examinations Foundation
GCSECombined Science Chemistry A
Gateway ScienceJ250/03: Paper 3
(Foundation Tier) General Certificate
of Secondary Education with marking
scheme
, Oxford Cambridge and RSA
Monday 22 May 2023 – Morning
GCSE (9–1) Combined Science
(Chemistry) A (Gateway Science)
J250/03 Paper 3 (Foundation Tier)
Time allowed: 1 hour 10 minutes
F
* 9 1 3 2 2 6 8 2 8 6 *
You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9–1) Combined Science
(Chemistry) A (inside this document)
You can use:
• a scientific or graphical calculator
• an HB pencil
* J 2 5 0 0 3 *
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 2023 [601/8687/2] OCR is an exempt Charity
DC (ST/CB) 301263/7 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 What is the part of the atom labelled X called?
X
A Core
B Ion
C Nucleus
D Shell
Your answer [1]
2 The table shows the properties of four different substances.
Which substance is a metal?
Appearance at Melting point and
Substance Conducts heat?
room temperature boiling point
A green gas low no
B colourless solid high no
C shiny red-orange solid high yes
D white solid high no
Your answer [1]
© OCR 2023
, 3
3 Which is an example of a neutralisation reaction?
A A metal reacting with an acid
B A non-metal reacting with oxygen
C A salt dissolving in water
D An acid reacting with an alkali
Your answer [1]
4 Lead has a melting point of 328 °C. Mercury has a melting point of –39 °C.
Which row describes the state of lead and mercury at 100 °C?
State of lead State of mercury
A liquid liquid
B liquid solid
C solid liquid
D solid solid
Your answer [1]
5 Which element forms compounds with covalent molecules consisting of chains and rings?
A Argon
B Carbon
C Hydrogen
D Oxygen
Your answer [1]
© OCR 2023 Turn over
