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ocr A Level Chemistry A H432/02 Synthesis and analytical techniques -Question Paper June 2024
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ocrTuesday 18 June 2024 – Morning
A Level Chemistry A
H432/02 Synthesis and analytical techniques
Time allowed: 2 hours 15 minutes
You must have:
the Data Sheet for Chemistry A
You can use:
a scientific or graphical calculator
an HB pencil
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
INSTRUCTIONS
Last name
• 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 100.
• 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 32 pages.
ADVICE
• Read each question carefully before you start your answer.
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]
verified
, 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]
verified 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]
verified
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