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Tuesday 12 October 2021 – Morning A Level Chemistry A H432/02 Synthesis and analytical techniques
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Tuesday 12 October 2021 – Morning A Level Chemistry A H432/02 Synthesis and analytical techniques
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Oxford Cambridge and RSATuesday 12 October 2021 – Morning
A Level Chemistry A
H432/02 Synthesis and analytical techniques
Time allowed: 2 hours 15 minutes
You must have:
* 8 9 6 1 8 3 8 1 1 6 *
• the Data Sheet for Chemistry A
You can use:
• a scientific or graphical calculator
• an HB pencil
* H 4 3 2 0 2 *
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 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.
© OCR 2021 [601/5255/2] OCR is an exempt Charity
DC (ST/JG) 300167/4 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.
Answer all the questions.
1 2-Methylbutane is reacted with chlorine by radical substitution.
What is the number of structural isomers with the molecular formula C5H11Cl that could be
formed?
A 2
B 3
C 4
D 5
Your answer
[1]
2 Which type(s) of stereoisomerism is/are shown by 2,4-dimethylhex-2-ene?
A E / Z isomerism only.
B Optical isomerism only.
C Both E / Z isomerism and optical isomerism.
D Neither E / Z isomerism nor optical isomerism.
Your answer
[1]
3 Which sample contains the greatest number of carbon atoms?
A 20.0 g C6H5OH
B 30.0 g C2H5COOH
C 40.0 g CH3CHO
D 50.0 g CH3OH
Your answer
[1]
© OCR 2021
, 3
4 What is the correct equation for the incomplete combustion of butan-1-ol?
A CH3CH2CH2CH2OH + 1½O2 4CO + 5H2
B CH3CH2CH2CH2OH + 2O2 4CO + 5H2
C CH3CH2CH2CH2OH + 4O2 4CO + 5H2O
D CH3CH2CH2CH2OH + 4½O2 4CO + 5H2O
Your answer
[1]
5 2-Methylcyclopentanone, shown below, is reacted with NaCN(aq)/H+(aq) to form an organic
product.
O
CH3
2-methylcyclopentanone
Which statement is correct?
A In the mechanism, a CN– ion accepts an electron pair.
B The mechanism is electrophilic addition.
C The organic product has one chiral centre.
D The organic product has the molecular formula C7H11NO.
Your answer
[1]
© OCR 2021 Turn over
, 4
6 CH3CH2COOCH3 is heated with aqueous sodium hydroxide to produce two organic products.
What are the two organic products?
A CH3CH2COOH and CH3OH
B CH3CH2COONa and CH3OH
C CH3CH2COOH and CH3ONa
D CH3CH2COONa and CH3ONa
Your answer
[1]
7 Menthol, shown below, is heated with an acid catalyst.
OH
menthol
Which structure could be formed?
A B C D
Your answer
[1]
© OCR 2021
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