Chemistry A (H032, H432)
H032/01, Breadth in chemistry (AS level), June
2024
Nadya French
Please note that you may see slight differences between
this paper and the original.
Duration: 90 mins
Candidates answer on the Question paper.
OCR supplied materials:
Additional resources may be supplied with this paper.
Other materials required:
• Pencil
• Ruler (cm/mm)
INSTRUCTIONS TO CANDIDATES
• Write your name, centre number and candidate number in the boxes above. Please write clearly and in capital letters.
• Use black ink. HB pencil may be used for graphs and diagrams only.
• Answer all the questions, unless your teacher tells you otherwise.
• Read each question carefully. Make sure you know what you have to do before starting your answer.
• Where space is provided below the question, please write your answer there.
• You may use additional paper, or a specific Answer sheet if one is provided, but you must clearly show your candidate
number, centre number and question number(s).
INFORMATION FOR CANDIDATES
• The quality of written communication is assessed in questions marked with either a pencil or an asterisk. In History and
Geography a Quality of extended response question is marked with an asterisk, while a pencil is used for questions in
which Spelling, punctuation and grammar and the use of specialist terminology is assessed.
• The number of marks is given in brackets [ ] at the end of each question or part question.
• The total number of marks for this paper is 70.
• The total number of marks may take into account some 'either/or' question choices.
© OCR 2025. You may photocopy this page. 1 of 47 Created in ExamBuilder
, 1 Which diagram shows a p-orbital?
A
B
C
D
Your answer [1]
2 Which row shows the atomic structure of 25Mg2+?
Protons Neutrons Electrons
A 10 12 13
B 10 15 12
C 12 13 10
D 12 13 14
Your answer [1]
3 A nitrogen oxide contains 36.84% of nitrogen by mass.
What is the empirical formula of the nitrogen oxide?
A NO
B NO2
C N2O
D N2O3
Your answer [1]
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, 4 Carbon monoxide reacts with oxygen to form carbon dioxide:
2CO(g) + O2(g) → 2CO2(g)
Which volumes of CO(g) and O2(g) produce the largest volume of CO2(g)?
All gas volumes are measured at RTP.
A 1.00 dm3 CO and 4.00 dm3 O2
B 2.00 dm3 CO and 3.00 dm3 O2
C 3.00 dm3 CO and 2.00 dm3 O2
D 4.00 dm3 CO and 1.00 dm3 O2
Your answer [1]
5 Which reaction produces a product with linear molecules?
A 2B + 3F2 →
B C + O2 →
C 2H2 + O2 →
D N2 + 3H2 →
Your answer [1]
6 Which statement about the periodic table is not correct?
A Elements in the same group have similar chemical properties.
B The elements are ordered by increasing atomic mass.
C The elements are ordered by increasing atomic number.
D There is a repeating trend of physical and chemical properties across the periods.
Your answer [1]
7 Group 2 compounds can be used in agriculture to neutralise acid soils and in medicine to treat indigestion.
Which Group 2 compound is not suitable for either use?
A Mg(OH)2
B MgSO4
C CaCO3
D CaO
Your answer [1]
© OCR 2025. You may photocopy this page. 3 of 47 Created in ExamBuilder
, 8 In the UK, water companies typically treat drinking water with chlorine gas at a concentration of 0.500 mg dm-3 or
less.
Which statement about UK drinking water is correct?
A Chlorine in drinking water can catalyse the breakdown of ozone.
B Chlorine may form toxic chlorinated hydrocarbons.
C Drinking water with a chlorine gas concentration of 0.500 mg dm–3 contains 2.12 × 1018 chlorine molecules
in each dm3.
D In hot weather, chlorine can vaporise from drinking water to cause global warming.
Your answer [1]
9 Which reaction does not show disproportionation of chlorine?
A MnO2 + 4HCl → MnCl2 + Cl2 + 2H2O
B Cl2 + H2O → HCl + HClO
C 2ClO2 + 2NaOH → NaClO2 + NaClO3 + H2O
D 2NaOH + Cl2 → NaCl + NaClO + H2O
Your answer [1]
10 An unknown compound is tested to identify whether it contains sulfate, carbonate or halide ions.
What is the correct sequence of tests required?
A carbonate, halide, sulfate
B carbonate, sulfate, halide
C halide, carbonate, sulfate
D sulfate, carbonate, halide
Your answer [1]
© OCR 2025. You may photocopy this page. 4 of 47 Created in ExamBuilder
H032/01, Breadth in chemistry (AS level), June
2024
Nadya French
Please note that you may see slight differences between
this paper and the original.
Duration: 90 mins
Candidates answer on the Question paper.
OCR supplied materials:
Additional resources may be supplied with this paper.
Other materials required:
• Pencil
• Ruler (cm/mm)
INSTRUCTIONS TO CANDIDATES
• Write your name, centre number and candidate number in the boxes above. Please write clearly and in capital letters.
• Use black ink. HB pencil may be used for graphs and diagrams only.
• Answer all the questions, unless your teacher tells you otherwise.
• Read each question carefully. Make sure you know what you have to do before starting your answer.
• Where space is provided below the question, please write your answer there.
• You may use additional paper, or a specific Answer sheet if one is provided, but you must clearly show your candidate
number, centre number and question number(s).
INFORMATION FOR CANDIDATES
• The quality of written communication is assessed in questions marked with either a pencil or an asterisk. In History and
Geography a Quality of extended response question is marked with an asterisk, while a pencil is used for questions in
which Spelling, punctuation and grammar and the use of specialist terminology is assessed.
• The number of marks is given in brackets [ ] at the end of each question or part question.
• The total number of marks for this paper is 70.
• The total number of marks may take into account some 'either/or' question choices.
© OCR 2025. You may photocopy this page. 1 of 47 Created in ExamBuilder
, 1 Which diagram shows a p-orbital?
A
B
C
D
Your answer [1]
2 Which row shows the atomic structure of 25Mg2+?
Protons Neutrons Electrons
A 10 12 13
B 10 15 12
C 12 13 10
D 12 13 14
Your answer [1]
3 A nitrogen oxide contains 36.84% of nitrogen by mass.
What is the empirical formula of the nitrogen oxide?
A NO
B NO2
C N2O
D N2O3
Your answer [1]
© OCR 2025. You may photocopy this page. 2 of 47 Created in ExamBuilder
, 4 Carbon monoxide reacts with oxygen to form carbon dioxide:
2CO(g) + O2(g) → 2CO2(g)
Which volumes of CO(g) and O2(g) produce the largest volume of CO2(g)?
All gas volumes are measured at RTP.
A 1.00 dm3 CO and 4.00 dm3 O2
B 2.00 dm3 CO and 3.00 dm3 O2
C 3.00 dm3 CO and 2.00 dm3 O2
D 4.00 dm3 CO and 1.00 dm3 O2
Your answer [1]
5 Which reaction produces a product with linear molecules?
A 2B + 3F2 →
B C + O2 →
C 2H2 + O2 →
D N2 + 3H2 →
Your answer [1]
6 Which statement about the periodic table is not correct?
A Elements in the same group have similar chemical properties.
B The elements are ordered by increasing atomic mass.
C The elements are ordered by increasing atomic number.
D There is a repeating trend of physical and chemical properties across the periods.
Your answer [1]
7 Group 2 compounds can be used in agriculture to neutralise acid soils and in medicine to treat indigestion.
Which Group 2 compound is not suitable for either use?
A Mg(OH)2
B MgSO4
C CaCO3
D CaO
Your answer [1]
© OCR 2025. You may photocopy this page. 3 of 47 Created in ExamBuilder
, 8 In the UK, water companies typically treat drinking water with chlorine gas at a concentration of 0.500 mg dm-3 or
less.
Which statement about UK drinking water is correct?
A Chlorine in drinking water can catalyse the breakdown of ozone.
B Chlorine may form toxic chlorinated hydrocarbons.
C Drinking water with a chlorine gas concentration of 0.500 mg dm–3 contains 2.12 × 1018 chlorine molecules
in each dm3.
D In hot weather, chlorine can vaporise from drinking water to cause global warming.
Your answer [1]
9 Which reaction does not show disproportionation of chlorine?
A MnO2 + 4HCl → MnCl2 + Cl2 + 2H2O
B Cl2 + H2O → HCl + HClO
C 2ClO2 + 2NaOH → NaClO2 + NaClO3 + H2O
D 2NaOH + Cl2 → NaCl + NaClO + H2O
Your answer [1]
10 An unknown compound is tested to identify whether it contains sulfate, carbonate or halide ions.
What is the correct sequence of tests required?
A carbonate, halide, sulfate
B carbonate, sulfate, halide
C halide, carbonate, sulfate
D sulfate, carbonate, halide
Your answer [1]
© OCR 2025. You may photocopy this page. 4 of 47 Created in ExamBuilder
