Oxford Cambridge and RSA
Tuesday 11 June 2024 – Morning
GCSE (9–1) Combined Science A
(Gateway Science)
J250/10 Chemistry (Higher Tier)
Time allowed: 1 hour 10 minutes
H
* 9 9 8 3 0 6 8 0 7 1 *
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
* J 2 5 0 1 0 *
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 2024 [601/8687/2] OCR is an exempt Charity
DC (ST/CT) 322417/7 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 Carbon reacts with copper oxide to produce copper.
copper oxide + carbon copper + carbon dioxide
What is the role of the carbon?
A It is a catalyst.
B It neutralises the copper oxide.
C It oxidises the copper oxide.
D It reduces the copper oxide.
Your answer [1]
2 A teacher investigates some reactions of chlorine.
Why is it important that the teacher does not breathe in chlorine?
A Chlorine is highly flammable.
B Chlorine is inert.
C Chlorine is strongly alkaline.
D Chlorine is toxic.
Your answer [1]
3 Where do scientists think that the oxygen in the Earth’s atmosphere came from?
A Earthquakes
B Green plants
C Thunderstorms
D Volcanic activity
Your answer [1]
© OCR 2024
, 3
4 Which of the catalysts is an example of an enzyme?
A Alumina – used in the cracking of hydrocarbons
B Copper – used in the reaction between zinc and dilute sulfuric acid
C Lipase – used to help humans absorb fats
D Manganese oxide – used in the decomposition of hydrogen peroxide
Your answer [1]
5 The graph shows the supply and demand of different fractions of crude oil.
Key:
Supply
Relative amount Demand
of fractions
Gases Petrol Paraffin Diesel Fuel oil
Which fractions are most likely to be cracked to make the supply match the demand?
A Diesel and fuel oil
B Gases and petrol
C Paraffin and fuel oil
D Petrol and diesel
Your answer [1]
© OCR 2024 Turn over
, 4
6 Acid rain is a dilute solution of a weak acid.
What is the pH of acid rain?
A 1–2
B 4–5
C 8–9
D 13–14
Your answer [1]
7 A student investigates the rate of reaction between marble chips and dilute hydrochloric acid.
The graph shows how the mass of the reactants changes during the reaction.
100
99
Mass (g) 98
97
96
0 100 200 300 400 500
Time (s)
What are the units for the rate of reaction?
A g
B g/s
C s
D s/g
Your answer [1]
© OCR 2024
Tuesday 11 June 2024 – Morning
GCSE (9–1) Combined Science A
(Gateway Science)
J250/10 Chemistry (Higher Tier)
Time allowed: 1 hour 10 minutes
H
* 9 9 8 3 0 6 8 0 7 1 *
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
* J 2 5 0 1 0 *
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 2024 [601/8687/2] OCR is an exempt Charity
DC (ST/CT) 322417/7 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 Carbon reacts with copper oxide to produce copper.
copper oxide + carbon copper + carbon dioxide
What is the role of the carbon?
A It is a catalyst.
B It neutralises the copper oxide.
C It oxidises the copper oxide.
D It reduces the copper oxide.
Your answer [1]
2 A teacher investigates some reactions of chlorine.
Why is it important that the teacher does not breathe in chlorine?
A Chlorine is highly flammable.
B Chlorine is inert.
C Chlorine is strongly alkaline.
D Chlorine is toxic.
Your answer [1]
3 Where do scientists think that the oxygen in the Earth’s atmosphere came from?
A Earthquakes
B Green plants
C Thunderstorms
D Volcanic activity
Your answer [1]
© OCR 2024
, 3
4 Which of the catalysts is an example of an enzyme?
A Alumina – used in the cracking of hydrocarbons
B Copper – used in the reaction between zinc and dilute sulfuric acid
C Lipase – used to help humans absorb fats
D Manganese oxide – used in the decomposition of hydrogen peroxide
Your answer [1]
5 The graph shows the supply and demand of different fractions of crude oil.
Key:
Supply
Relative amount Demand
of fractions
Gases Petrol Paraffin Diesel Fuel oil
Which fractions are most likely to be cracked to make the supply match the demand?
A Diesel and fuel oil
B Gases and petrol
C Paraffin and fuel oil
D Petrol and diesel
Your answer [1]
© OCR 2024 Turn over
, 4
6 Acid rain is a dilute solution of a weak acid.
What is the pH of acid rain?
A 1–2
B 4–5
C 8–9
D 13–14
Your answer [1]
7 A student investigates the rate of reaction between marble chips and dilute hydrochloric acid.
The graph shows how the mass of the reactants changes during the reaction.
100
99
Mass (g) 98
97
96
0 100 200 300 400 500
Time (s)
What are the units for the rate of reaction?
A g
B g/s
C s
D s/g
Your answer [1]
© OCR 2024
