OCR A Level Paper 1 Predicted Paper

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


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, 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


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