OCR
GCSE
Chemistry B
H033/01: Foundations of chemistry
*1428844795*
AS Level
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] DC (ST/JG) 344603/5
OCR is an exempt Charity
Turn over
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
, 2
2 Which of these is a tertiary alcohol?
A CH3CH(OH)CH3
B
OH
H H H C
H C C C OH
H H H
OH D
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
4 Ethanol can be dehydrated.
C2H5OH C2H4 + H2O
What process describes this reaction?
A drying
B elimination
C oxidation
D reduction
Your answer
5 A student is measuring the effect of temperature on the rate of reaction of
hydrochloric acid with calcium carbonate.
© OCR 2025
, 3
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
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
7 The Geiger and Marsden experiment was an important step in discovering the
structure of the atom.
What could be deduced from this experiment?
A Atoms consist of balancing positive and negative charges.
B Atoms have a small dense nucleus.
C The electrons in an atom are in energy levels.
D The nucleus contains neutrons.
Your answer
8 What is correct about the emissions from petrol-fuelled cars?
A CO comes from the complete combustion of petrol.
B NOx is mainly made by the combustion of nitrogen compounds in petrol.
C SO2 is made by the combustion of sulfur compounds in petrol.
© OCR 2025 Turn over
, 4
D No unburnt hydrocarbons are emitted.
Your answer
9 How can benzene be described?
A A cycloalkene
B An alkane
C An alkene
D An arene
Your answer
10 What is a disadvantage of using hydrogen rather than methane for burning in home
gas boilers?
A Hydrogen can be made by electrolysis of water using alternative energy
sources.
B Hydrogen gives no CO2 when burned.
C Hydrogen is less dense and more likely to leak out of pipes.
D Hydrogen is renewable.
Your answer
11 1-bromopropane reacts with hydroxide ions:
C3H7Br + OH– C3H7OH + .............
What is correct?
A 1-iodopropane undergoes a similar reaction but more slowly.
B The missing product is HBr.
C The OH– ion is acting as a nucleophile.
D This is an addition reaction.
Your answer
12 Sodium hydroxide reacts with sulfuric acid:
© OCR 2025
GCSE
Chemistry B
H033/01: Foundations of chemistry
*1428844795*
AS Level
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] DC (ST/JG) 344603/5
OCR is an exempt Charity
Turn over
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
, 2
2 Which of these is a tertiary alcohol?
A CH3CH(OH)CH3
B
OH
H H H C
H C C C OH
H H H
OH D
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
4 Ethanol can be dehydrated.
C2H5OH C2H4 + H2O
What process describes this reaction?
A drying
B elimination
C oxidation
D reduction
Your answer
5 A student is measuring the effect of temperature on the rate of reaction of
hydrochloric acid with calcium carbonate.
© OCR 2025
, 3
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
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
7 The Geiger and Marsden experiment was an important step in discovering the
structure of the atom.
What could be deduced from this experiment?
A Atoms consist of balancing positive and negative charges.
B Atoms have a small dense nucleus.
C The electrons in an atom are in energy levels.
D The nucleus contains neutrons.
Your answer
8 What is correct about the emissions from petrol-fuelled cars?
A CO comes from the complete combustion of petrol.
B NOx is mainly made by the combustion of nitrogen compounds in petrol.
C SO2 is made by the combustion of sulfur compounds in petrol.
© OCR 2025 Turn over
, 4
D No unburnt hydrocarbons are emitted.
Your answer
9 How can benzene be described?
A A cycloalkene
B An alkane
C An alkene
D An arene
Your answer
10 What is a disadvantage of using hydrogen rather than methane for burning in home
gas boilers?
A Hydrogen can be made by electrolysis of water using alternative energy
sources.
B Hydrogen gives no CO2 when burned.
C Hydrogen is less dense and more likely to leak out of pipes.
D Hydrogen is renewable.
Your answer
11 1-bromopropane reacts with hydroxide ions:
C3H7Br + OH– C3H7OH + .............
What is correct?
A 1-iodopropane undergoes a similar reaction but more slowly.
B The missing product is HBr.
C The OH– ion is acting as a nucleophile.
D This is an addition reaction.
Your answer
12 Sodium hydroxide reacts with sulfuric acid:
© OCR 2025
