OCR SUMMER 2026
PREDICTED PAPER
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
a ruler (cm/mm)
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 35 pages.
ADVICE
• Read each question carefully before you start your answer.
Turn over
for more: tyrionpapers.com
, 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 Deuterium is an isotope of hydrogen. Compared to ordinary hydrogen (¹H), deuterium has:
A One more proton and one more electron
B One more neutron only
C One more proton only
D One fewer electron
Your answer [1]
2 A hydrated salt has the formula CuSO₄·xH₂O. A 7.98 g sample is heated to remove
all water of crystallisation, leaving 5.10 g of anhydrous CuSO₄. What is the value of x?
(Cu=63.5, S=32.0, O=16.0, H=1.0)
A 3
B 4
C 5
D 6
Your answer [1]
3 CaF₂ has a much higher melting point (1423°C) than NaF (993°C).
What is the primary reason for this difference?
A CaF₂ has a larger lattice structure than NaF
B Ca²⁺ ions have a greater ionic charge than Na⁺, creating stronger electrostatic
attraction
C F⁻ ions are smaller in CaF₂ than in NaF
D CaF₂ has more ions per formula unit than NaF
Your answer [1]
for more: tyrionpapers.com
, 3
4 Water (H₂O) has a bond angle of 104.5° while ammonia (NH₃) has 107°, and
methane (CH₄) has 109.5°. What is the correct explanation for this trend?
A Oxygen is more electronegative than nitrogen, pulling bonds closer together
B Each lone pair repels more strongly than a bonded pair, progressively reducing the bond
angle
C Water has fewer atoms so the bonds are compressed
D Hydrogen atoms in water are smaller than in ammonia
Your answer [1]
5 Consider the propagation steps in free radical substitution of methane:
Step 1: Cl• + CH₄ → HCl + CH₃•
Step 2: CH₃• + Cl₂ → CH₃Cl + Cl•
Which statement about these steps is correct?
A Step 1 involves heterolytic fission; Step 2 involves homolytic fission
B Both steps involve heterolytic fission producing ionic intermediates
C Both steps involve homolytic fission; radicals are consumed and regenerated
D Step 1 produces ions; Step 2 produces radicals
Your answer [1]
for more: tyrionpapers.com
, 4
6 Methanol and methane have the same number of carbon atoms. Methanol has a
significantly higher boiling point than methane. Which combination of factors best
explains this?
A Methanol has a higher molar mass and stronger London forces than methane
B Methanol has a polar O–H bond enabling hydrogen bonding; methane has only weak
London forces between non-polar molecules
C Methanol has more electrons than methane creating stronger London forces
D Methane has stronger covalent bonds that require more energy to break during boiling
Your answer [1]
7 Phenol partially dissociates in water according to the equation:
C₆H₅OH ⇌ C₆H₅O⁻ + H⁺
Which statement best explains why phenol is classified as a weak acid rather than a
strong acid?
A Phenol does not dissolve in water at all
B Phenol only partially dissociates in water, establishing an equilibrium rather than fully
ionizing
C Phenol reacts with water to form a strong base
D Phenol has too large a molecule to fully dissociate
Your answer [1]
for more: tyrionpapers.com
PREDICTED PAPER
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
a ruler (cm/mm)
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 35 pages.
ADVICE
• Read each question carefully before you start your answer.
Turn over
for more: tyrionpapers.com
, 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 Deuterium is an isotope of hydrogen. Compared to ordinary hydrogen (¹H), deuterium has:
A One more proton and one more electron
B One more neutron only
C One more proton only
D One fewer electron
Your answer [1]
2 A hydrated salt has the formula CuSO₄·xH₂O. A 7.98 g sample is heated to remove
all water of crystallisation, leaving 5.10 g of anhydrous CuSO₄. What is the value of x?
(Cu=63.5, S=32.0, O=16.0, H=1.0)
A 3
B 4
C 5
D 6
Your answer [1]
3 CaF₂ has a much higher melting point (1423°C) than NaF (993°C).
What is the primary reason for this difference?
A CaF₂ has a larger lattice structure than NaF
B Ca²⁺ ions have a greater ionic charge than Na⁺, creating stronger electrostatic
attraction
C F⁻ ions are smaller in CaF₂ than in NaF
D CaF₂ has more ions per formula unit than NaF
Your answer [1]
for more: tyrionpapers.com
, 3
4 Water (H₂O) has a bond angle of 104.5° while ammonia (NH₃) has 107°, and
methane (CH₄) has 109.5°. What is the correct explanation for this trend?
A Oxygen is more electronegative than nitrogen, pulling bonds closer together
B Each lone pair repels more strongly than a bonded pair, progressively reducing the bond
angle
C Water has fewer atoms so the bonds are compressed
D Hydrogen atoms in water are smaller than in ammonia
Your answer [1]
5 Consider the propagation steps in free radical substitution of methane:
Step 1: Cl• + CH₄ → HCl + CH₃•
Step 2: CH₃• + Cl₂ → CH₃Cl + Cl•
Which statement about these steps is correct?
A Step 1 involves heterolytic fission; Step 2 involves homolytic fission
B Both steps involve heterolytic fission producing ionic intermediates
C Both steps involve homolytic fission; radicals are consumed and regenerated
D Step 1 produces ions; Step 2 produces radicals
Your answer [1]
for more: tyrionpapers.com
, 4
6 Methanol and methane have the same number of carbon atoms. Methanol has a
significantly higher boiling point than methane. Which combination of factors best
explains this?
A Methanol has a higher molar mass and stronger London forces than methane
B Methanol has a polar O–H bond enabling hydrogen bonding; methane has only weak
London forces between non-polar molecules
C Methanol has more electrons than methane creating stronger London forces
D Methane has stronger covalent bonds that require more energy to break during boiling
Your answer [1]
7 Phenol partially dissociates in water according to the equation:
C₆H₅OH ⇌ C₆H₅O⁻ + H⁺
Which statement best explains why phenol is classified as a weak acid rather than a
strong acid?
A Phenol does not dissolve in water at all
B Phenol only partially dissociates in water, establishing an equilibrium rather than fully
ionizing
C Phenol reacts with water to form a strong base
D Phenol has too large a molecule to fully dissociate
Your answer [1]
for more: tyrionpapers.com
