Oxford Cambridge and RSA
Friday 17 May 2024 – 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 pencil
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 begiven
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 is an exempt Charity
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 When iron reacts with dilute hydrochloric acid, bubbles of hydrogen are produced.
Which state symbol describes these bubbles?
A aq
B g
C l
D s
Your answer [1]
2 Magnesium reacts with oxygen to make magnesium oxide.
magnesium + oxygen magnesium oxide
Which type of reaction is shown by the equation?
A Displacement
B Electrolysis
C Neutralisation
D Oxidation
Your answer [1]
3 Which gas turns limewater cloudy?
A Carbon dioxide
B Chlorine
C Hydrogen
D Oxygen
Your answer [1]
© OCR 2024
, 3
4 Zinc chloride is an ionic compound made from Zn and Cl – ions.
2+
What is made at the negative electrode during the electrolysis of molten zinc chloride?
A Chlorine
B Hydrogen
C Oxygen
D Zinc
Your answer [1]
5 The table shows the colours of an indicator at different pH values.
1 2 3 4 5 6 7 8 9 10 11 12
Pink Orange Purple Green
Which colour is this indicator in a neutral solution?
A Green
B Orange
C Pink
D Purple
Your answer [1]
6 The energy change in a reaction is 30 000 J.What
is the energy change in kJ?
A 3
B 30
C 300
D 3000
Your answer [1]
© OCR 2024 Turn over
, 4
7 Which row describes a formulation?
Description Amount of chemicals
A compound exact
B mixture exact
C compound random
D mixture random
Your answer [1]
8 What is the ionic equation for an aqueous neutralisation reaction?
A H+ + OH+ H2O B
H+ + OH– H2O C
H– + OH+ H2O D H– +
OH– H2O
Your answer [1]
© OCR 2024
Friday 17 May 2024 – 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 pencil
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 begiven
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 is an exempt Charity
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 When iron reacts with dilute hydrochloric acid, bubbles of hydrogen are produced.
Which state symbol describes these bubbles?
A aq
B g
C l
D s
Your answer [1]
2 Magnesium reacts with oxygen to make magnesium oxide.
magnesium + oxygen magnesium oxide
Which type of reaction is shown by the equation?
A Displacement
B Electrolysis
C Neutralisation
D Oxidation
Your answer [1]
3 Which gas turns limewater cloudy?
A Carbon dioxide
B Chlorine
C Hydrogen
D Oxygen
Your answer [1]
© OCR 2024
, 3
4 Zinc chloride is an ionic compound made from Zn and Cl – ions.
2+
What is made at the negative electrode during the electrolysis of molten zinc chloride?
A Chlorine
B Hydrogen
C Oxygen
D Zinc
Your answer [1]
5 The table shows the colours of an indicator at different pH values.
1 2 3 4 5 6 7 8 9 10 11 12
Pink Orange Purple Green
Which colour is this indicator in a neutral solution?
A Green
B Orange
C Pink
D Purple
Your answer [1]
6 The energy change in a reaction is 30 000 J.What
is the energy change in kJ?
A 3
B 30
C 300
D 3000
Your answer [1]
© OCR 2024 Turn over
, 4
7 Which row describes a formulation?
Description Amount of chemicals
A compound exact
B mixture exact
C compound random
D mixture random
Your answer [1]
8 What is the ionic equation for an aqueous neutralisation reaction?
A H+ + OH+ H2O B
H+ + OH– H2O C
H– + OH+ H2O D H– +
OH– H2O
Your answer [1]
© OCR 2024
