Oxford Cambridge and RSA
Tuesday 18 June 2024 – Morning
A Level Chemistry A
H432/02 Synthesis and analytical techniques
Time allowed: 2 hours 15 minutes
Turn over
, 2
Section A
You should spend a maximum of 20 minutes on this section.
Write your answer to each question in the box provided.
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]
© OCR 2024
, 3
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]
4 The structure of but-1-ene is shown below.
x
y
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]
© OCR 2024 Turn over
, 4
5 Geraniol, shown below, is a component in many natural oils.
OH
Geraniol
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]
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]
© OCR 2024
Tuesday 18 June 2024 – Morning
A Level Chemistry A
H432/02 Synthesis and analytical techniques
Time allowed: 2 hours 15 minutes
Turn over
, 2
Section A
You should spend a maximum of 20 minutes on this section.
Write your answer to each question in the box provided.
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]
© OCR 2024
, 3
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]
4 The structure of but-1-ene is shown below.
x
y
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]
© OCR 2024 Turn over
, 4
5 Geraniol, shown below, is a component in many natural oils.
OH
Geraniol
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]
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]
© OCR 2024
