2026 Updated Document Study Guide and Exam Preparation Resource File

20251202204902_692f50be2a2f6_ngcr__19_.docx
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20251202204902_692f50be2a2f6_ngcr__19_.docx




2025 OCR GCSE Combined Science B (Twenty First Century Science)
J260/02 Chemistry (Foundation Tier)
Complete Question paper with Marking Scheme Combined




Monday 19 May 2025 – Morning
GCSE (9–1) Combined Science B
(Twenty First Century Science)
J260/02 Chemistry (Foundation Tier)
Time allowed: 1 hour 45 minutes

You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9–1) Combined Science
F
(Chemistry) B (inside this document)
You can use:
• an HB pencil
• a scientific or graphical calculator


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 95.
• 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 24 pages.

ADVICE
• Read each question carefully before you start your answer.




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3
1 Many everyday products are based on the chemistry of acid reactions.

(a) Complete the sentences to describe how to show that a solution is acidic.

Put a ring around each correct option.

Add a few drops of alkali / universal indicator / water to a small amount of the solution.

If the solution is acidic, the solution will turn blue / green / red.
[2]

(b) Acids react with some metals to form a salt and hydrogen.

The table shows some information about the reactions between some metals and acids.

(i) Complete the table.

Metal Acid Salt formed

Calcium Nitric acid
................................

Iron Iron sulfate
................................
[2]

(ii) Pieces of zinc metal react with dilute sulfuric acid to form a solution of zinc sulfate and hydrogen gas.

Complete the state symbols in the balanced symbol equation.


Zn(........) + H2SO4(........) ZnSO4(........) + H2(. ......... )
[2]

(c) Acids react with alkalis to form a salt and water, for example:

HCl NaOH NaCl H2O
+ +
Acid Alkali Salt Water

Complete the sentences to describe this type of reaction.

Put a ring around each correct option.

When an acid reacts with an alkali it is called evaporation / neutralisation / precipitation.

During the reaction, H+ / Na+ / Cl – ions from the acid react with H+ / Na+ / OH– ions from the alkali.
[3]




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4
2 Nanoparticles are very small particles. They have many important uses.

(a) Fullerene and graphene are nanoparticles made from carbon.

The diagrams show their structures.




Fullerene Graphene

(i) Complete the table to show which statements are true for fullerenes only, graphene only, both or neither.

Tick (✓) one box in each row.

True for True for
True for True for
fullerene graphene
both neither
only only
Each carbon atom is bonded to 5 other carbon
atoms.
The carbon atoms in each structure are covalently
bonded.

The structure is a molecule.


The structure is a sheet of rings.

[4]

(ii) Graphene is a very good conductor of electricity.

Complete the sentence to explain why.

Put a ring around each correct option.

Graphene is a good conductor of electricity because the atoms / electrons / ions

within graphene can evaporate / move / vibrate.
[2]




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