Oxford Cambridge and RSA
GCSE (9–1) Chemistry A (Gateway Science)
J248/04 (Higher Tier)
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 90.
• 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 28 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 30 minutes on this section.
Write your answer to each question in the box provided.
1 Which substance is an unsaturated hydrocarbon?
A CH4
B C2H6
C C3H6
D C3H8
Your answer [1]
2 What happens when liquid bromine, Br2, boils?
A Covalent bonds break
B Electrostatic forces break
C Intermolecular forces break
D Ionic bonds break
Your answer [1]
3 What is a life-cycle assessment?
A Analysis of the cost of making, using, and disposing of a product.
B Analysis of the energy needed to use a product throughout its lifetime.
C Analysis of the potential environmental impact of manufacturing a product.
D Analysis of the potential environmental impact that a product may have throughout its
lifetime.
Your answer [1]
© OCR 2024
, 3
4 Which of these is one of the four nucleotides in the polymer DNA?
A Cytosine
B Deoxyribose
C Fructose
D Phosphate
Your answer [1]
5 Polyesters are condensation polymers.
Which monomers are polyesters made from?
A A carboxylic acid and an ester
B An alcohol and a carboxylic acid
C An alcohol and an amine
D An amine and a carboxylic acid
Your answer [1]
6 Nitrogen and oxygen react together at high temperatures in car engines.
Nitrogen monoxide is made.
What is the balanced equation for the reaction?
A N + O NO
B N + O2 NO2
C N2 + O2 2NO
D 2N2 + O2 2N2O
Your answer [1]
© OCR 2024 Turn over
, 4
7 What is an advantage of extracting metals by phytoextraction?
A It can extract metals from contaminated soils.
B It is dependent on weather conditions.
C It is slow.
D It produces carbon dioxide gas when the plants are burnt.
Your answer [1]
8 What is the average rate of this reaction, in cm3 / s, during the first 5 seconds?
20
15
Volume of gas
(cm3) 10
5
0
0 5 10 15 20 25
Time (s)
A 0.5 cm3 / s
B 2.0 cm3 / s
C 5.0 cm3 / s
D 50.0 cm3 / s
Your answer [1]
© OCR 2024
GCSE (9–1) Chemistry A (Gateway Science)
J248/04 (Higher Tier)
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 90.
• 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 28 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 30 minutes on this section.
Write your answer to each question in the box provided.
1 Which substance is an unsaturated hydrocarbon?
A CH4
B C2H6
C C3H6
D C3H8
Your answer [1]
2 What happens when liquid bromine, Br2, boils?
A Covalent bonds break
B Electrostatic forces break
C Intermolecular forces break
D Ionic bonds break
Your answer [1]
3 What is a life-cycle assessment?
A Analysis of the cost of making, using, and disposing of a product.
B Analysis of the energy needed to use a product throughout its lifetime.
C Analysis of the potential environmental impact of manufacturing a product.
D Analysis of the potential environmental impact that a product may have throughout its
lifetime.
Your answer [1]
© OCR 2024
, 3
4 Which of these is one of the four nucleotides in the polymer DNA?
A Cytosine
B Deoxyribose
C Fructose
D Phosphate
Your answer [1]
5 Polyesters are condensation polymers.
Which monomers are polyesters made from?
A A carboxylic acid and an ester
B An alcohol and a carboxylic acid
C An alcohol and an amine
D An amine and a carboxylic acid
Your answer [1]
6 Nitrogen and oxygen react together at high temperatures in car engines.
Nitrogen monoxide is made.
What is the balanced equation for the reaction?
A N + O NO
B N + O2 NO2
C N2 + O2 2NO
D 2N2 + O2 2N2O
Your answer [1]
© OCR 2024 Turn over
, 4
7 What is an advantage of extracting metals by phytoextraction?
A It can extract metals from contaminated soils.
B It is dependent on weather conditions.
C It is slow.
D It produces carbon dioxide gas when the plants are burnt.
Your answer [1]
8 What is the average rate of this reaction, in cm3 / s, during the first 5 seconds?
20
15
Volume of gas
(cm3) 10
5
0
0 5 10 15 20 25
Time (s)
A 0.5 cm3 / s
B 2.0 cm3 / s
C 5.0 cm3 / s
D 50.0 cm3 / s
Your answer [1]
© OCR 2024
