OCR
GCSE
Chemistry A
H432/02: Synthesis and analytical techniques
*1849114533*
A Level
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 36 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2025 [601/5255/2] DC (WW/SW) 346686/6
OCR is an exempt Charity
Turn over
Section A
You should spend a maximum of 20 minutes on this section.
Write your answer to each question in the box provided.
1 Which compound is alicyclic and unsaturated?
A
, 2
B
C
D
Your answer
[1] 2 0.0200 mol of the compound below reacts with Br 2(aq) to make a saturated
compound.
How many grams of Br2 are needed for this reaction?
Cl
A 3.20
B 6.39
C 7.99
D 12.80
Your answer
© OCR 2025
, 3
[1]
3 The skeletal structure of a medicinal drug is shown below.
How many hydrogen atoms are in its molecular formula?
H
N
Cl
Cl
Section A.................................................................................................................... 1
B................................................................................................................................. 2
C 6.............................................................................................................................. 6
D 8.............................................................................................................................. 6
Your answer
[1] 4 Which diagram shows the correct way to set up apparatus for converting ethanol to
ethanoic acid?
water out water in
water in water out
A B
© OCR 2025 Turn over
, 4
water out water in
water in water out
C D
Your answer
[1] 5 0.200 mol of HOOCCH2CH2COOH is reacted with 0.300 mol NaOH.
How many water molecules are formed?
A 1.204 × 1023
B 1.806 × 1023
C 2.408 × 1023
D 3.612 × 1023
Your answer
[1]
6 Propene can be prepared using the reactions shown.
Which reaction has the lowest atom economy?
A C3H7Br C H6 + HBr
3
B C12H26 32C H6 + C6H14
C C8H18 3 6C H + C5H12
3
D C3H7OH C H6 + H2O
Your answer
© OCR 2025
GCSE
Chemistry A
H432/02: Synthesis and analytical techniques
*1849114533*
A Level
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 36 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2025 [601/5255/2] DC (WW/SW) 346686/6
OCR is an exempt Charity
Turn over
Section A
You should spend a maximum of 20 minutes on this section.
Write your answer to each question in the box provided.
1 Which compound is alicyclic and unsaturated?
A
, 2
B
C
D
Your answer
[1] 2 0.0200 mol of the compound below reacts with Br 2(aq) to make a saturated
compound.
How many grams of Br2 are needed for this reaction?
Cl
A 3.20
B 6.39
C 7.99
D 12.80
Your answer
© OCR 2025
, 3
[1]
3 The skeletal structure of a medicinal drug is shown below.
How many hydrogen atoms are in its molecular formula?
H
N
Cl
Cl
Section A.................................................................................................................... 1
B................................................................................................................................. 2
C 6.............................................................................................................................. 6
D 8.............................................................................................................................. 6
Your answer
[1] 4 Which diagram shows the correct way to set up apparatus for converting ethanol to
ethanoic acid?
water out water in
water in water out
A B
© OCR 2025 Turn over
, 4
water out water in
water in water out
C D
Your answer
[1] 5 0.200 mol of HOOCCH2CH2COOH is reacted with 0.300 mol NaOH.
How many water molecules are formed?
A 1.204 × 1023
B 1.806 × 1023
C 2.408 × 1023
D 3.612 × 1023
Your answer
[1]
6 Propene can be prepared using the reactions shown.
Which reaction has the lowest atom economy?
A C3H7Br C H6 + HBr
3
B C12H26 32C H6 + C6H14
C C8H18 3 6C H + C5H12
3
D C3H7OH C H6 + H2O
Your answer
© OCR 2025
