OCR A Chemistry H432/01 · 2026 Predicted Paper 1
A Level Chemistry A (OCR H432/01)
Breadth in Chemistry · Modules 1, 2, 3 & 4
2026 PREDICTED PAPER 1
Compiled from specification analysis, 2023-2025 paper trends & examiner reports
Duration: 2 hours 15 minutes Instructions:
Total marks: 100 Answer ALL questions in BOTH sections
Sections: A (15 MC) + B (85 structured) Show ALL working in calculations
Use black ink or ball-point pen
How to use this predicted paper
Green boxes show the exact OCR A specification reference for each question. Questions are weighted
towards topics with HIGH prediction confidence, identified by cross-referencing the specification, 2023-
25 past papers, and OCR examiner reports highlighting areas needing development.
© Predicted Paper — For Revision Use Only Page 1
, OCR A Chemistry H432/01 · 2026 Predicted Paper 1
SECTION A — Multiple Choice
Answer ALL 15 questions. Select ONE answer: A, B, C or D. 15 marks total (1 mark each).
[SPEC] 2.1.2 – Formulae, equations and moles | Prediction: HIGH (appears every year)
1. Which of the following contains the greatest number of molecules?
A 0.25 mol of N₂O₄
B 1.60 g of O₂ (Mᵣ = 32 g mol⁻¹)
C 22.4 dm³ of H₂ at STP
D 0.50 mol of CO₂
[SPEC] 2.1.3 – Concentration calculations | Prediction: HIGH
2. A student dissolves 5.30 g of anhydrous Na₂CO₃ (M = 106 g mol⁻¹) in water and makes the
solution up to 250 cm³. What is the concentration in mol dm⁻³?
A 0.0500 mol dm⁻³
B 0.100 mol dm⁻³
C 0.200 mol dm⁻³
D 0.400 mol dm⁻³
[SPEC] 2.2.1 – Ionic bonding and giant ionic lattices | Prediction: MEDIUM
3. Which property is NOT characteristic of a giant ionic lattice?
A High melting point
B Conducts electricity when dissolved in water
C Soluble in non-polar solvents
D Brittle when a shearing force is applied
[SPEC] 2.2.3 – Shapes of molecules using VSEPR | Prediction: HIGH
4. Which species has a bond angle of approximately 107°?
A BF₃
B H₂O
C NH₃
D CH₄
[SPEC] 3.1.1 – Periodicity; first ionisation energies | Prediction: HIGH
5. The first ionisation energies of four consecutive Period 3 elements are shown below. Which
element is silicon (Si)?
Element 1st IE / kJ mol⁻¹
W 738
X 578
© Predicted Paper — For Revision Use Only Page 2
, OCR A Chemistry H432/01 · 2026 Predicted Paper 1
Y 786
Z 1012
A W
B X
C Y
D Z
[SPEC] 3.1.2 – Group 2; reactions with water | Prediction: HIGH
6. When magnesium oxide is added to water, what colour would universal indicator turn?
A Red (pH 2–3)
B Orange (pH 5–6)
C Green (pH 7)
D Purple (pH 11–12)
[SPEC] 3.1.3 – Group 7; oxidising ability of halogens | Prediction: HIGH
7. Chlorine water is added to potassium iodide solution and shaken with hexane. What colour is
observed in the hexane layer?
A Colourless
B Yellow/brown
C Orange/red
D Purple/violet
[SPEC] 3.2.1 – Enthalpy changes; definitions | Prediction: HIGH
8. Which definition correctly describes the standard enthalpy of formation?
A The enthalpy change when 1 mol of substance completely combusts in excess oxygen
under standard conditions
B The enthalpy change when 1 mol of substance is formed from its constituent elements in
their standard states under standard conditions
C The enthalpy change when a bond is broken in 1 mol of gaseous molecules
D The enthalpy change when 1 mol of ionic compound dissolves completely in water
[SPEC] 3.2.2 – Bond enthalpies | Prediction: MEDIUM-HIGH
9. Use the mean bond enthalpies below to calculate ΔH for: H₂(g) + Cl₂(g) → 2HCl(g)
Bond Mean Bond Enthalpy / kJ mol⁻¹
H–H 436
Cl–Cl 243
H–Cl 432
© Predicted Paper — For Revision Use Only Page 3
A Level Chemistry A (OCR H432/01)
Breadth in Chemistry · Modules 1, 2, 3 & 4
2026 PREDICTED PAPER 1
Compiled from specification analysis, 2023-2025 paper trends & examiner reports
Duration: 2 hours 15 minutes Instructions:
Total marks: 100 Answer ALL questions in BOTH sections
Sections: A (15 MC) + B (85 structured) Show ALL working in calculations
Use black ink or ball-point pen
How to use this predicted paper
Green boxes show the exact OCR A specification reference for each question. Questions are weighted
towards topics with HIGH prediction confidence, identified by cross-referencing the specification, 2023-
25 past papers, and OCR examiner reports highlighting areas needing development.
© Predicted Paper — For Revision Use Only Page 1
, OCR A Chemistry H432/01 · 2026 Predicted Paper 1
SECTION A — Multiple Choice
Answer ALL 15 questions. Select ONE answer: A, B, C or D. 15 marks total (1 mark each).
[SPEC] 2.1.2 – Formulae, equations and moles | Prediction: HIGH (appears every year)
1. Which of the following contains the greatest number of molecules?
A 0.25 mol of N₂O₄
B 1.60 g of O₂ (Mᵣ = 32 g mol⁻¹)
C 22.4 dm³ of H₂ at STP
D 0.50 mol of CO₂
[SPEC] 2.1.3 – Concentration calculations | Prediction: HIGH
2. A student dissolves 5.30 g of anhydrous Na₂CO₃ (M = 106 g mol⁻¹) in water and makes the
solution up to 250 cm³. What is the concentration in mol dm⁻³?
A 0.0500 mol dm⁻³
B 0.100 mol dm⁻³
C 0.200 mol dm⁻³
D 0.400 mol dm⁻³
[SPEC] 2.2.1 – Ionic bonding and giant ionic lattices | Prediction: MEDIUM
3. Which property is NOT characteristic of a giant ionic lattice?
A High melting point
B Conducts electricity when dissolved in water
C Soluble in non-polar solvents
D Brittle when a shearing force is applied
[SPEC] 2.2.3 – Shapes of molecules using VSEPR | Prediction: HIGH
4. Which species has a bond angle of approximately 107°?
A BF₃
B H₂O
C NH₃
D CH₄
[SPEC] 3.1.1 – Periodicity; first ionisation energies | Prediction: HIGH
5. The first ionisation energies of four consecutive Period 3 elements are shown below. Which
element is silicon (Si)?
Element 1st IE / kJ mol⁻¹
W 738
X 578
© Predicted Paper — For Revision Use Only Page 2
, OCR A Chemistry H432/01 · 2026 Predicted Paper 1
Y 786
Z 1012
A W
B X
C Y
D Z
[SPEC] 3.1.2 – Group 2; reactions with water | Prediction: HIGH
6. When magnesium oxide is added to water, what colour would universal indicator turn?
A Red (pH 2–3)
B Orange (pH 5–6)
C Green (pH 7)
D Purple (pH 11–12)
[SPEC] 3.1.3 – Group 7; oxidising ability of halogens | Prediction: HIGH
7. Chlorine water is added to potassium iodide solution and shaken with hexane. What colour is
observed in the hexane layer?
A Colourless
B Yellow/brown
C Orange/red
D Purple/violet
[SPEC] 3.2.1 – Enthalpy changes; definitions | Prediction: HIGH
8. Which definition correctly describes the standard enthalpy of formation?
A The enthalpy change when 1 mol of substance completely combusts in excess oxygen
under standard conditions
B The enthalpy change when 1 mol of substance is formed from its constituent elements in
their standard states under standard conditions
C The enthalpy change when a bond is broken in 1 mol of gaseous molecules
D The enthalpy change when 1 mol of ionic compound dissolves completely in water
[SPEC] 3.2.2 – Bond enthalpies | Prediction: MEDIUM-HIGH
9. Use the mean bond enthalpies below to calculate ΔH for: H₂(g) + Cl₂(g) → 2HCl(g)
Bond Mean Bond Enthalpy / kJ mol⁻¹
H–H 436
Cl–Cl 243
H–Cl 432
© Predicted Paper — For Revision Use Only Page 3
