Chemistry A (H032, H432)
H432/02, Synthesis and analytical techniques (AS/A
level), June 2024
Neil Bechley
Please note that you may see slight differences between
this paper and the original.
Duration: 135 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 99.
• The total number of marks may take into account some 'either/or' question choices.
© OCR 2025. You may photocopy this page. 1 of 76 Created in ExamBuilder
, 1 All organic compounds have covalent bonds.
What is the electrostatic attraction in a covalent bond between?
A A shared pair of electrons and the nuclei of the bonded atoms
B Cations and delocalised electrons
C Oppositely charged ions
D Two molecules
Your answer [1]
2 Hydrogen reacts much more readily with alkenes than with alkanes.
Why is this?
A Alkenes are polar molecules whereas alkanes are not.
B All atoms in an alkane have a full outer shell of electrons.
C The bond enthalpy of C–C σ bonds is higher than that of π bonds.
D The bond enthalpy of C–C σ bonds is lower than that of π bonds.
Your answer [1]
3 A student investigates the rate of hydrolysis of different iodoalkanes using aqueous silver nitrate in ethanol.
What colour of precipitate is seen?
A Brown
B Cream
C White
D Yellow
Your answer [1]
© OCR 2025. You may photocopy this page. 2 of 76 Created in ExamBuilder
, 4 The structure of but-1-ene is shown below.
Which row has the correct shape around carbon atoms labelled x and y?
x y
A Tetrahedral Pyramidal
B Trigonal planar Tetrahedral
C Trigonal planar Pyramidal
D Pyramidal Tetrahedral
Your answer [1]
5 Geraniol, shown below, is a component in many natural oils.
Which pair of reagents identifies both functional groups in geraniol?
A Acidified dichromate(VI) and 2,4-dinitrophenylhydrazine.
B Bromine water and 2,4-dinitrophenylhydrazine.
C Bromine water and acidified dichromate(VI).
D Tollens’ reagent and aqueous silver nitrate in ethanol.
Your answer [1]
© OCR 2025. You may photocopy this page. 3 of 76 Created in ExamBuilder
, 6 4.30 g of the alcohol C5H9OH, (Mr = 86.0), is burned in oxygen.
C5H9OH(l) + 7O2(g) → 5CO2(g) + 5H2O(l)
Which volume of oxygen gas is needed, in dm3, for this complete combustion of C5H9OH, at RTP?
A 1.2
B 2.4
C 5.8
D 8.4
Your answer [1]
7 Which statement gives a valid scientific reason for global warming?
A Infrared radiation causes bonds in CH4 molecules to vibrate more.
B Infrared radiation causes O2 molecules to vibrate more.
C Ultraviolet radiation causes bonds in CO2 to vibrate more.
D Ultraviolet radiation causes bonds in CFC molecules to break.
Your answer [1]
8 The CFC CCl2F2 can cause the breakdown of ozone in the upper atmosphere.
Which initiation step could occur with ultraviolet radiation to catalyse this breakdown?
A CCl2F2 → •C + •Cl2F2
B CCl2F2 → •F + •CCl2F
C CCl2F2 → •Cl + •CClF2
D CCl2F2 → •Cl2 + •CF2
Your answer [1]
© OCR 2025. You may photocopy this page. 4 of 76 Created in ExamBuilder
H432/02, Synthesis and analytical techniques (AS/A
level), June 2024
Neil Bechley
Please note that you may see slight differences between
this paper and the original.
Duration: 135 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 99.
• The total number of marks may take into account some 'either/or' question choices.
© OCR 2025. You may photocopy this page. 1 of 76 Created in ExamBuilder
, 1 All organic compounds have covalent bonds.
What is the electrostatic attraction in a covalent bond between?
A A shared pair of electrons and the nuclei of the bonded atoms
B Cations and delocalised electrons
C Oppositely charged ions
D Two molecules
Your answer [1]
2 Hydrogen reacts much more readily with alkenes than with alkanes.
Why is this?
A Alkenes are polar molecules whereas alkanes are not.
B All atoms in an alkane have a full outer shell of electrons.
C The bond enthalpy of C–C σ bonds is higher than that of π bonds.
D The bond enthalpy of C–C σ bonds is lower than that of π bonds.
Your answer [1]
3 A student investigates the rate of hydrolysis of different iodoalkanes using aqueous silver nitrate in ethanol.
What colour of precipitate is seen?
A Brown
B Cream
C White
D Yellow
Your answer [1]
© OCR 2025. You may photocopy this page. 2 of 76 Created in ExamBuilder
, 4 The structure of but-1-ene is shown below.
Which row has the correct shape around carbon atoms labelled x and y?
x y
A Tetrahedral Pyramidal
B Trigonal planar Tetrahedral
C Trigonal planar Pyramidal
D Pyramidal Tetrahedral
Your answer [1]
5 Geraniol, shown below, is a component in many natural oils.
Which pair of reagents identifies both functional groups in geraniol?
A Acidified dichromate(VI) and 2,4-dinitrophenylhydrazine.
B Bromine water and 2,4-dinitrophenylhydrazine.
C Bromine water and acidified dichromate(VI).
D Tollens’ reagent and aqueous silver nitrate in ethanol.
Your answer [1]
© OCR 2025. You may photocopy this page. 3 of 76 Created in ExamBuilder
, 6 4.30 g of the alcohol C5H9OH, (Mr = 86.0), is burned in oxygen.
C5H9OH(l) + 7O2(g) → 5CO2(g) + 5H2O(l)
Which volume of oxygen gas is needed, in dm3, for this complete combustion of C5H9OH, at RTP?
A 1.2
B 2.4
C 5.8
D 8.4
Your answer [1]
7 Which statement gives a valid scientific reason for global warming?
A Infrared radiation causes bonds in CH4 molecules to vibrate more.
B Infrared radiation causes O2 molecules to vibrate more.
C Ultraviolet radiation causes bonds in CO2 to vibrate more.
D Ultraviolet radiation causes bonds in CFC molecules to break.
Your answer [1]
8 The CFC CCl2F2 can cause the breakdown of ozone in the upper atmosphere.
Which initiation step could occur with ultraviolet radiation to catalyse this breakdown?
A CCl2F2 → •C + •Cl2F2
B CCl2F2 → •F + •CCl2F
C CCl2F2 → •Cl + •CClF2
D CCl2F2 → •Cl2 + •CF2
Your answer [1]
© OCR 2025. You may photocopy this page. 4 of 76 Created in ExamBuilder
