2020
, OCR A Level Chemistry A (H432) Chemistry B (H433)
PAG 7: Qualitative analysis of organic functional groups
Practice Exam Questions and Mark Scheme
This resource includes exam questions from both Chemistry A and Chemistry B. It is not designed as a
topic test but is instead intended as a document to support the teaching and learning of Module 1 –
Development of practical skills in chemistry.
1. Which reagent could be used to distinguish between CH3CH2OH and C6H5OH?
A AgNO3(aq) in ethanol
B CH3COCl
C Na2CO3(aq)
D Bromine water
Your answer
[1]
2(a). A chemist analyses a naturally occurring aromatic compound.
The percentage composition and mass spectrum of the compound are shown below.
Percentage composition by mass: C, 70.58%; H, 5.92%; O, 23.50%.
Mass spectrum
Determine the molecular formula of the compound.
Show your working.
molecular formula = .............................................. [3]
Created in ExamBuilder 1 © OCR 2020
, OCR A Level Chemistry A (H432) Chemistry B (H433)
PAG 7: Qualitative analysis of organic functional groups
Practice Exam Questions and Mark Scheme
This resource includes exam questions from both Chemistry A and Chemistry B. It is not designed as a
topic test but is instead intended as a document to support the teaching and learning of Module 1 –
Development of practical skills in chemistry.
1. Which reagent could be used to distinguish between CH3CH2OH and C6H5OH?
A AgNO3(aq) in ethanol
B CH3COCl
C Na2CO3(aq)
D Bromine water
Your answer
[1]
2(a). A chemist analyses a naturally occurring aromatic compound.
The percentage composition and mass spectrum of the compound are shown below.
Percentage composition by mass: C, 70.58%; H, 5.92%; O, 23.50%.
Mass spectrum
Determine the molecular formula of the compound.
Show your working.
molecular formula = .............................................. [3]
Created in ExamBuilder 1 © OCR 2020
