1 Primary alcohols can be oxidised under distillation to make aldehydes.
Draw a labelled diagram to show how you would set up apparatus for distillation.
[2]
2(a) Oil of wintergreen is a liquid used in medicine to relieve muscle pain.
Compound H is a component in oil of wintergreen and can be synthesised from compound G, as shown below.
The boiling point and density of compound H are stated.
A student prepares a sample of compound H by the method below.
Step 1 Reflux 8.97 g of compound G for 30 minutes with an excess of methanol in the presence of a small
amount of sulfuric acid as a catalyst.
Step 2 Add an excess of aqueous sodium carbonate, Na2CO3(aq). Two layers are obtained.
Step 3 Purify the impure compound H that forms from the resulting mixture.
The student follows this method and obtains 5.32 g of pure compound H.
Why does the student use reflux in Step 1?
[1]
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, (b) Describe how to purify the impure compound H from the two layers in Step 2.
[4]
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]
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, 4 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]
5 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]
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, 6 Which functional groups are present in the compound below?
A Alcohol and aldehyde.
B Alcohol and ketone.
C Carboxylic acid and aldehyde.
D Carboxylic acid and ketone.
Your answer [1]
7 A student has planned the two-stage synthesis shown below.
Which compound could be the intermediate for this synthesis?
A
B
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Draw a labelled diagram to show how you would set up apparatus for distillation.
[2]
2(a) Oil of wintergreen is a liquid used in medicine to relieve muscle pain.
Compound H is a component in oil of wintergreen and can be synthesised from compound G, as shown below.
The boiling point and density of compound H are stated.
A student prepares a sample of compound H by the method below.
Step 1 Reflux 8.97 g of compound G for 30 minutes with an excess of methanol in the presence of a small
amount of sulfuric acid as a catalyst.
Step 2 Add an excess of aqueous sodium carbonate, Na2CO3(aq). Two layers are obtained.
Step 3 Purify the impure compound H that forms from the resulting mixture.
The student follows this method and obtains 5.32 g of pure compound H.
Why does the student use reflux in Step 1?
[1]
© OCR 2025. You may photocopy this page. 1 of 41 Created in ExamBuilder
, (b) Describe how to purify the impure compound H from the two layers in Step 2.
[4]
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 41 Created in ExamBuilder
, 4 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]
5 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]
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, 6 Which functional groups are present in the compound below?
A Alcohol and aldehyde.
B Alcohol and ketone.
C Carboxylic acid and aldehyde.
D Carboxylic acid and ketone.
Your answer [1]
7 A student has planned the two-stage synthesis shown below.
Which compound could be the intermediate for this synthesis?
A
B
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