Chemistry A (H032, H432)
H032/01, Breadth in chemistry (AS level), June
2024_clone
Adam Smith
Please note that you may see slight differences between
this paper and the original.
Duration: Not set
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 607.
• The total number of marks may take into account some 'either/or' question choices.
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, 1 Three alcohols, A, B and C, are structural isomers with the molecular formula C5H12O.
A, B and C take part in combustion reactions.
Complete the equation for the complete combustion of C5H12O.
C5H12O + ..................................................................................................................................... [2]
2(a) This question is about the chemistry of compounds containing phosphorus.
Phosphine, PH3, is a poisonous gas.
i. Phosphine reacts with oxygen gas to form phosphorus(V) oxide and water.
Write the equation for this reaction.
[1]
ii. Aqueous silver nitrate, AgNO3, is reduced by PH3.
The unbalanced equation is shown below.
Balance the equation and use oxidation numbers to explain why this is a redox reaction.
........ AgNO3 + ........ PH3 + ........ H2O ........ Ag + ........ H3PO3 +........ HNO3
Explanation
[3]
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, (b) When phosphorus(V) chloride, PCl5, and ammonium chloride are heated together, the compound P3N3Cl6 is
formed, together with HCl gas.
P3N3Cl6 has a cyclic structure, like the Kekulé structure of benzene.
i. Write an equation for the reaction of PCl5 and ammonium chloride to form P3N3Cl6.
[1]
ii. Calculate the percentage by mass of P in P3N3Cl6.
Give your answer to 2 decimal places.
percentage by mass of P = ................... % [2]
iii. Suggest one example of evidence that could show that P3N3Cl6 has a Kekulé structure rather than a
delocalised structure.
[1]
iv. In a molecule of P3N3Cl6 all the N and Cl atoms are bonded to P atoms.
Suggest a possible structure for a molecule of P3N3Cl6.
[2]
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, 3 This question is about the analysis of organic compounds.
A student investigates the alkaline hydrolysis of 1-bromopropane as outlined below.
Step 1 The student adds 1-bromopropane to an excess of aqueous potassium hydroxide, KOH(aq), in a pear-
shaped flask.
Step 2 A TLC chromatogram is run using propan-1-ol and the reaction mixture.
Step 3 The reaction mixture is refluxed.
A TLC chromatogram of the reaction mixture is run every 10 minutes.
The TLC chromatograms are shown below
i. Determine the Rf value of propan–1–ol.
Show your working.
Rf = ................... [1]
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H032/01, Breadth in chemistry (AS level), June
2024_clone
Adam Smith
Please note that you may see slight differences between
this paper and the original.
Duration: Not set
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 607.
• The total number of marks may take into account some 'either/or' question choices.
© OCR 2025. You may photocopy this page. 1 of 137 Created in ExamBuilder
, 1 Three alcohols, A, B and C, are structural isomers with the molecular formula C5H12O.
A, B and C take part in combustion reactions.
Complete the equation for the complete combustion of C5H12O.
C5H12O + ..................................................................................................................................... [2]
2(a) This question is about the chemistry of compounds containing phosphorus.
Phosphine, PH3, is a poisonous gas.
i. Phosphine reacts with oxygen gas to form phosphorus(V) oxide and water.
Write the equation for this reaction.
[1]
ii. Aqueous silver nitrate, AgNO3, is reduced by PH3.
The unbalanced equation is shown below.
Balance the equation and use oxidation numbers to explain why this is a redox reaction.
........ AgNO3 + ........ PH3 + ........ H2O ........ Ag + ........ H3PO3 +........ HNO3
Explanation
[3]
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, (b) When phosphorus(V) chloride, PCl5, and ammonium chloride are heated together, the compound P3N3Cl6 is
formed, together with HCl gas.
P3N3Cl6 has a cyclic structure, like the Kekulé structure of benzene.
i. Write an equation for the reaction of PCl5 and ammonium chloride to form P3N3Cl6.
[1]
ii. Calculate the percentage by mass of P in P3N3Cl6.
Give your answer to 2 decimal places.
percentage by mass of P = ................... % [2]
iii. Suggest one example of evidence that could show that P3N3Cl6 has a Kekulé structure rather than a
delocalised structure.
[1]
iv. In a molecule of P3N3Cl6 all the N and Cl atoms are bonded to P atoms.
Suggest a possible structure for a molecule of P3N3Cl6.
[2]
© OCR 2025. You may photocopy this page. 3 of 137 Created in ExamBuilder
, 3 This question is about the analysis of organic compounds.
A student investigates the alkaline hydrolysis of 1-bromopropane as outlined below.
Step 1 The student adds 1-bromopropane to an excess of aqueous potassium hydroxide, KOH(aq), in a pear-
shaped flask.
Step 2 A TLC chromatogram is run using propan-1-ol and the reaction mixture.
Step 3 The reaction mixture is refluxed.
A TLC chromatogram of the reaction mixture is run every 10 minutes.
The TLC chromatograms are shown below
i. Determine the Rf value of propan–1–ol.
Show your working.
Rf = ................... [1]
© OCR 2025. You may photocopy this page. 4 of 137 Created in ExamBuilder
