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GCSE (9-1) COMBINED SCIENCE A (GATEWAY SCIENCE) — June 2025 PAST PAPER: Chemistry (Foundation Tier) Merged Question Paper & Mark Scheme [OCR J250/04]

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GCSE (9-1) COMBINED SCIENCE A (GATEWAY SCIENCE) — June 2025 PAST PAPER: Chemistry (Foundation Tier) Merged Question Paper & Mark Scheme [OCR J250/04]

Institution
GCSE COMBINED SCIENCE A
Course
GCSE COMBINED SCIENCE A

Content preview

, 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 part of the Periodic Table contains the least reactive non-metals?




D
C
A
B




Your answer [1]


2 Which gas in the atmosphere causes acid rain?

A Carbon monoxide

B Hydrogen

C Oxygen

D Sulfur dioxide


Your answer [1]


3 When is electrolysis used to extract a metal from its ore?

A The metal dissolves in water.

B The metal has a high melting point.

C The metal is in high demand.

D The metal is very reactive.

Your answer [1]




©5

, 3
4 The diagram shows the stages in a life-cycle assessment.

Disposal Raw materials




Use Manufacture




X

What is stage X?

A Consumer research

B Design of the product

C Processing of the raw materials

D Transportation of the product


Your answer [1]


5 Part of the reactivity series is shown below.

Aluminium most reactive
Carbon
Tin
Lead least reactive

Which metal(s) are produced when their metal oxides are heated with carbon?

A Aluminium only

B Aluminium and lead

C Tin and lead

D Tin only

Your answer [1]




© OCR 2025 Turn over

, 4
6 When marble chips react with an acid, they produce a colourless solution and a gas.

Which method is used to determine the rate of reaction?

A A disappearing cross experiment

B Gas chromatography

C Measuring the mass loss using a balance

D Measuring the volume of solution produced


Your answer [1]


7 Which Group 7 element is a red-brown liquid at room temperature?

A Fluorine

B Chlorine

C Bromine

D Iodine


Your answer [1]


8 Desalination is the removal of salt from seawater to produce drinking water.

The seawater is heated and the water vapour condensed and collected.

Which separation technique is used to produce drinking water in desalination?

A Chromatography

B Crystallisation

C Distillation

D Filtration

Your answer [1]




©5

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Institution
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Course
GCSE COMBINED SCIENCE A

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