OIUYUGGCV KJHGYTFGKJN HGRSYTG GR456789876545E -09876RDFVV BIUYTRSXCVB
UYTDRSTYUYT IUGYFDR4634345 74WDFGJHCG V76RDFUHVCT5RY8UY U6EDFUI6
Oxford Cambridge and RSA
YTDRGB YTRER78 TEWSDH KUYFDSXC JYTRDSDFGHOKN GFDSWERGH JHVRSGB
AS-Level OCR 2025 Chemistry B (Salters) Paper 1
IUYRTE4567B7645 883E 7656 984E
Tuesday 13 May 2025 – Morning
AS Level Chemistry B (Salters)
H033/01 Foundations of chemistry
Time allowed: 1 hour 30 minutes
1
Turn over
, 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
Your answer [1]
© OCR 2025
, 3
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 Turn over
UYTDRSTYUYT IUGYFDR4634345 74WDFGJHCG V76RDFUHVCT5RY8UY U6EDFUI6
Oxford Cambridge and RSA
YTDRGB YTRER78 TEWSDH KUYFDSXC JYTRDSDFGHOKN GFDSWERGH JHVRSGB
AS-Level OCR 2025 Chemistry B (Salters) Paper 1
IUYRTE4567B7645 883E 7656 984E
Tuesday 13 May 2025 – Morning
AS Level Chemistry B (Salters)
H033/01 Foundations of chemistry
Time allowed: 1 hour 30 minutes
1
Turn over
, 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
Your answer [1]
© OCR 2025
, 3
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 Turn over
