2025 OCR AS Level Chemistry B (Salters) H033/01 Foundations of Chemistry | Verified Question Paper with Marking Scheme Attached | Complete Exam Prep & Practice Resource

Page 12025
of 382025
OCR AS
OCR
Level
A/ASChemistry
Level | Question
B (Salters)
Paper
H03301
with Exam-Ready
Foundations
2025of
Examiner
OCR
chemistry
A/AS
Mark
Verified
Level
Scheme
| Question
QuestionPaper
paperwith
withExam-Ready
Marking Scheme
Examiner
Attached.pdf
Mark Scheme



2025 OCR AS Level Chemistry B (Salters)
H033/01 Foundations of chemistry
Verified Question paper with Marking Scheme Attached



Oxford Cambridge and RSA

Tuesday 13 May 2025 – Morning
AS Level Chemistry B (Salters)
H033/01 Foundations of chemistry
Time allowed: 1 hour 30 minutes

You must have:
• the Data Sheet for Chemistry B
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 page 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 70.
• The marks for each question are shown in brackets [ ].
• This document has 20 pages.

ADVICE
• Read each question carefully before you start your answer



© OCR 2025 [601/5446/9] OCR is an exempt Charity
DC (ST/JG) 344603/5 Turn over

S Level question
2025 OCR
2025
paper,
AS
OCRLevel
including
ASChemistry
Level
the Chemistry
complete
B (Salters)
Question
B (Salters)
H03301
Paper
H03301
Foundations
with Foundations
Exam-Ready
of chemistry
ofExaminer
chemistry
Verified
Mark
Verified
Question
Scheme.
Question
paper
Covers
with
paperall
Marking
with
examinable
Marking
Schemecontent
Scheme
Attached.pdf
with
Attached.pdf
Verified Answers

, Page 22025
of 382025
OCR AS
OCR
Level
A/ASChemistry
Level | Question
B (Salters)
Paper
H03301
with Exam-Ready
Foundations
2025of
Examiner
OCR
chemistry
A/AS
Mark
Verified
Level
Scheme
| Question
QuestionPaper
paperwith
withExam-Ready
Marking Scheme
Examiner
Attached.pdf
Mark Scheme



2
SECTION A

You should spend a maximum of 25 minutes on this section.

Write your answer to each question in the box provided.

1 What is correct about atomic number?

A It is half the mass number for most elements.

B It is the number of neutrons in the nucleus.

C It determines the position of an element in the periodic table.

D It varies between isotopes of the same element.

Your answer [1]


2 Which of these is a tertiary alcohol?

A CH3CH(OH)CH3


B
OH

C H H H

H C C C OH

H H H
D OH




Your answer [1]


3 Which row has the homologous series named correctly?

Compound Homologous series

A CH3CHO ketone

B CH3NH2 amine

C CH3COOCH3 carboxylic acid

D CH3COCH3 aldehyde


© OCR 2025




S Level question
2025 OCR
2025
paper,
AS
OCRLevel
including
ASChemistry
Level
the Chemistry
complete
B (Salters)
Question
B (Salters)
H03301
Paper
H03301
Foundations
with Foundations
Exam-Ready
of chemistry
ofExaminer
chemistry
Verified
Mark
Verified
Question
Scheme.
Question
paper
Covers
with
paperall
Marking
with
examinable
Marking
Schemecontent
Scheme
Attached.pdf
with
Attached.pdf
Verified Answers

, Page 32025
of 382025
OCR AS
OCR
Level
A/ASChemistry
Level | Question
B (Salters)
Paper
H03301
with Exam-Ready
Foundations
2025of
Examiner
OCR
chemistry
A/AS
Mark
Verified
Level
Scheme
| Question
QuestionPaper
paperwith
withExam-Ready
Marking Scheme
Examiner
Attached.pdf
Mark Scheme



3
Your answer [1]




© OCR 2025 Turn over



S Level question
2025 OCR
2025
paper,
AS
OCRLevel
including
ASChemistry
Level
the Chemistry
complete
B (Salters)
Question
B (Salters)
H03301
Paper
H03301
Foundations
with Foundations
Exam-Ready
of chemistry
ofExaminer
chemistry
Verified
Mark
Verified
Question
Scheme.
Question
paper
Covers
with
paperall
Marking
with
examinable
Marking
Schemecontent
Scheme
Attached.pdf
with
Attached.pdf
Verified Answers

, Page 42025
of 382025
OCR AS
OCR
Level
A/ASChemistry
Level | Question
B (Salters)
Paper
H03301
with Exam-Ready
Foundations
2025of
Examiner
OCR
chemistry
A/AS
Mark
Verified
Level
Scheme
| Question
QuestionPaper
paperwith
withExam-Ready
Marking Scheme
Examiner
Attached.pdf
Mark Scheme



4
4 Ethanol can be dehydrated.

C2H5OH C2H4 + H2O

What process describes this reaction?

A drying

B elimination

C oxidation

D reduction

Your answer [1]


5 A student is measuring the effect of temperature on the rate of reaction of hydrochloric acid with
calcium carbonate.

What is a variable that must be controlled?

A mass of calcium carbonate

B size of reacting flask

C temperature

D volume of CO2 produced

Your answer [1]


6 A substance has a high melting point and is soluble in water.

What is the structure type of the substance?

A covalent network

B ionic

C metallic

D simple molecular


Your answer [1]




© OCR 2025




S Level question
2025 OCR
2025
paper,
AS
OCRLevel
including
ASChemistry
Level
the Chemistry
complete
B (Salters)
Question
B (Salters)
H03301
Paper
H03301
Foundations
with Foundations
Exam-Ready
of chemistry
ofExaminer
chemistry
Verified
Mark
Verified
Question
Scheme.
Question
paper
Covers
with
paperall
Marking
with
examinable
Marking
Schemecontent
Scheme
Attached.pdf
with
Attached.pdf
Verified Answers