OCR SUMMER
2026 PREDICTED
PAPER
AS Level Chemistry B (Salters)
H033/02 Chemistry in depth
Time allowed: 1 hour 30 minutes
You must have:
• the Data Sheet for Chemistry B
You can use:
a scientific or graphical calculator
a ruler (cm/mm)
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
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 pages 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 [ ].
• Quality of extended response will be assessed in questions marked with an
asterisk (*).
• This document has 19 pages.
ADVICE
• Read each question carefully before you start your answer.
for more: tyrionpapers.com
, 2
1 A student investigates the properties and reactions of three alcohols: ethanol, propan-
1-ol and propan-2-ol.
(a) Ethanol and propane have similar molecular masses but very different boiling points.
Compound Mr Boiling point / °C
Ethanol, C₂H₅OH 46 +78
Propane, C₃H₈ 44 −42
(i) State the type of intermolecular force present in ethanol that is absent in propane and
accounts for its much higher boiling point.
...................................................................................................................................
................................................................................................................................... [1]
(ii) Explain, in terms of intermolecular forces, why propan-1-ol has a higher boiling point
than propan-2-ol.
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
................................................................................................................................... [2]
(b) The student oxidises propan-1-ol and propan-2-ol separately using acidified
potassium dichromate(VI) solution.
(i) Name the organic product obtained when propan-1-ol is distilled from the reaction
mixture during oxidation.
................................................................................................................................... [1]
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, 3
(ii) Write the equation for the further oxidation of this product to propanoic acid. Use [O]
to represent the oxidising agent.
.
[1]
(iii) Describe the observation when propan-2-ol is treated with acidified K₂Cr₂O₇, and
name the organic product formed.
.
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
................................................................................................................................... [2]
(c) Propan-1-ol is refluxed with acidified K₂Cr₂O₇ to produce compound X.
. IR spectrum X
for more: tyrionpapers.com
2026 PREDICTED
PAPER
AS Level Chemistry B (Salters)
H033/02 Chemistry in depth
Time allowed: 1 hour 30 minutes
You must have:
• the Data Sheet for Chemistry B
You can use:
a scientific or graphical calculator
a ruler (cm/mm)
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
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 pages 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 [ ].
• Quality of extended response will be assessed in questions marked with an
asterisk (*).
• This document has 19 pages.
ADVICE
• Read each question carefully before you start your answer.
for more: tyrionpapers.com
, 2
1 A student investigates the properties and reactions of three alcohols: ethanol, propan-
1-ol and propan-2-ol.
(a) Ethanol and propane have similar molecular masses but very different boiling points.
Compound Mr Boiling point / °C
Ethanol, C₂H₅OH 46 +78
Propane, C₃H₈ 44 −42
(i) State the type of intermolecular force present in ethanol that is absent in propane and
accounts for its much higher boiling point.
...................................................................................................................................
................................................................................................................................... [1]
(ii) Explain, in terms of intermolecular forces, why propan-1-ol has a higher boiling point
than propan-2-ol.
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
................................................................................................................................... [2]
(b) The student oxidises propan-1-ol and propan-2-ol separately using acidified
potassium dichromate(VI) solution.
(i) Name the organic product obtained when propan-1-ol is distilled from the reaction
mixture during oxidation.
................................................................................................................................... [1]
for more: tyrionpapers.com
, 3
(ii) Write the equation for the further oxidation of this product to propanoic acid. Use [O]
to represent the oxidising agent.
.
[1]
(iii) Describe the observation when propan-2-ol is treated with acidified K₂Cr₂O₇, and
name the organic product formed.
.
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
................................................................................................................................... [2]
(c) Propan-1-ol is refluxed with acidified K₂Cr₂O₇ to produce compound X.
. IR spectrum X
for more: tyrionpapers.com
