Tuesday 2 June 2026 – Morning
A Level Chemistry A
H432/01 Periodic table, elements and physical chemistry
Time allowed: 2 hours 15 minutes
You must have:
* 2 6 6 6 5 0 2 6 3 7 *
• the Data Sheet for Chemistry A
You can use:
• a scientific or graphical calculator
• an HB pencil
* H 4 3 2 0 1 *
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.
© Cambridge OCR 2026 [601/5255/2] Cambridge OCR is an exempt Charity
DC (CJ/CB) 363592/7 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 A sample of gallium with a relative atomic mass of 69.7 has two isotopes. The mass spectrum
shows the percentage abundance of one of the isotopes.
65%
Percentage
abundance
64 65 66 67 68 69 70 71 72 73 74 75 76
m/z
What is the mass-to-charge ratio, m / z, of the other isotope of gallium?
A 67
B 68
C 70
D 71
Your answer [1]
2 The reaction for the complete combustion of butane is
2C4H10(g) + 13O2(g) 8CO2(g) + 10H2O(l)
What is the volume of oxygen, in cm3, needed for the complete combustion of 0.0100 mol of
butane at room temperature and pressure (RTP)?
A 156
B 312
C 369
D 1560
Your answer [1]
© Cambridge OCR 2026
, 3
3 Which increase explains the trend in the boiling points down the halogen group?
A The strength of the covalent bonds
B The strength of the hydrogen bonds
C The strength of the induced dipole–dipole interactions (London forces)
D The strength of the permanent dipole–dipole interactions
Your answer [1]
4 3.56 g of element X combines with O2 to form 4.52 g of an oxide, XO2.
Which element is X?
A Si
B Ge
C Sn
D Pb
Your answer [1]
5 25.0 cm3 of sodium hydroxide solution is added to 25.0 cm3 of dilute hydrochloric acid.
The maximum temperature of the mixture formed is 27 °C.
The reaction releases 1045 J of energy.
What was the initial temperature of the dilute hydrochloric acid, in °C?
(Assume the specific heat capacity, c, of the mixture is the same as for water.)
A 17
B 22
C 32
D 37
Your answer [1]
© Cambridge OCR 2026 Turn over
, 4
6 An equilibrium equation between N2(g), H2(g) and NH3(g) is shown.
N2(g) + 3H2(g) 2NH3(g)
The numerical value of Kp at 600 K for this equilibrium is 1.66 × 10–3.
A different equilibrium equation between N2(g), H2(g) and NH3(g) is shown.
1
N (g)
2 2
+ 1 12 H2(g) NH3(g)
What is numerical value of Kp, at 600 K, for this equilibrium equation?
A 2.76 × 10–6
B 8.30 × 10–4
C 3.32 × 10–3
D 4.07 × 10–2
Your answer [1]
© Cambridge OCR 2026
A Level Chemistry A
H432/01 Periodic table, elements and physical chemistry
Time allowed: 2 hours 15 minutes
You must have:
* 2 6 6 6 5 0 2 6 3 7 *
• the Data Sheet for Chemistry A
You can use:
• a scientific or graphical calculator
• an HB pencil
* H 4 3 2 0 1 *
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.
© Cambridge OCR 2026 [601/5255/2] Cambridge OCR is an exempt Charity
DC (CJ/CB) 363592/7 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 A sample of gallium with a relative atomic mass of 69.7 has two isotopes. The mass spectrum
shows the percentage abundance of one of the isotopes.
65%
Percentage
abundance
64 65 66 67 68 69 70 71 72 73 74 75 76
m/z
What is the mass-to-charge ratio, m / z, of the other isotope of gallium?
A 67
B 68
C 70
D 71
Your answer [1]
2 The reaction for the complete combustion of butane is
2C4H10(g) + 13O2(g) 8CO2(g) + 10H2O(l)
What is the volume of oxygen, in cm3, needed for the complete combustion of 0.0100 mol of
butane at room temperature and pressure (RTP)?
A 156
B 312
C 369
D 1560
Your answer [1]
© Cambridge OCR 2026
, 3
3 Which increase explains the trend in the boiling points down the halogen group?
A The strength of the covalent bonds
B The strength of the hydrogen bonds
C The strength of the induced dipole–dipole interactions (London forces)
D The strength of the permanent dipole–dipole interactions
Your answer [1]
4 3.56 g of element X combines with O2 to form 4.52 g of an oxide, XO2.
Which element is X?
A Si
B Ge
C Sn
D Pb
Your answer [1]
5 25.0 cm3 of sodium hydroxide solution is added to 25.0 cm3 of dilute hydrochloric acid.
The maximum temperature of the mixture formed is 27 °C.
The reaction releases 1045 J of energy.
What was the initial temperature of the dilute hydrochloric acid, in °C?
(Assume the specific heat capacity, c, of the mixture is the same as for water.)
A 17
B 22
C 32
D 37
Your answer [1]
© Cambridge OCR 2026 Turn over
, 4
6 An equilibrium equation between N2(g), H2(g) and NH3(g) is shown.
N2(g) + 3H2(g) 2NH3(g)
The numerical value of Kp at 600 K for this equilibrium is 1.66 × 10–3.
A different equilibrium equation between N2(g), H2(g) and NH3(g) is shown.
1
N (g)
2 2
+ 1 12 H2(g) NH3(g)
What is numerical value of Kp, at 600 K, for this equilibrium equation?
A 2.76 × 10–6
B 8.30 × 10–4
C 3.32 × 10–3
D 4.07 × 10–2
Your answer [1]
© Cambridge OCR 2026
