CHEMISTRY-A-H032 · Cambridge OCR AS Level
CHEMISTRY-A-H032/21
Depth in Chemistry
Chemistry A - H032 · 2023 · Variant 1
Relative difficulty
Analysis source: OCR
Analysis aligned to the official syllabus and assessment design.
3.8 / 5
140
180 min
Enthalpy changes
Cohort performance
Session statistics from official examination reports
Total marks
140
Duration
180 min
Session difficulty
3.8 / 5
Key examiner messages
Top priorities from the principal examiner before you revise
The 2023 OCR AS Level Chemistry A (H032) papers represent a demanding assessment of the specification.
While the multiple-choice section in H032/01 provided some accessible recall marks, the structured questions in both papers required a high level of mathematical precision and structural fluency.
H032/02 in particular contained multi-step mathematical problems and experimental analysis questions that challenged even top-tier candidates.
Question difficulty map
How candidates performed on each question in this series
No data available in official reports
Assessment objectives
Skill and AO weighting from official examiner commentary
Skill weighting
Shows the skill mix this paper tested most heavily.
Mathematical
Weight: 6100%Structural Drawing
Weight: 583%Chemical Equations
Weight: 350%Logic &
Weight: 233%Recall & IUPAC
Weight: 117%
Method marks watchlist
Where working, steps, or method marks were commonly lost
No data available in official reports
Recurring mistakes across years
Themes examiners flag in multiple recent sessions for this subject
No data available in official reports
Question choice intelligence
Mean scores and popularity for optional questions (HKDSE electives)
No data available in official reports
Level exemplars
What candidate scripts at each grade level looked like
No data available in official reports
Grade & admission context
How marks relate to grade thresholds and entry standards
Report type
Examiner report — national grade boundaries and question-level commentary
Deep insights
What top candidates did
Techniques and approaches examiners rewarded in this series
No data available in official reports
Command word playbook
How to match each command word to the expected response style
Give reasons and link mechanism to outcome; each point needs a because/so chain.
Show formula, substitution, and unit; method marks need visible working.
Match the expected response style for “Draw” questions.
Match the expected response style for “State” questions.
Match the expected response style for “Complete” questions.
Time traps
Sections where candidates spent disproportionate time relative to marks
No data available in official reports
Syllabus traceability
Topics linked to questions and mark weighting in this session
Enthalpy changes
28 marks this session
Amount of substance
25 marks this session
Bonding and structure
15 marks this session
MCQ trap analytics
Commonly chosen wrong options from examiner commentary
No data available in official reports
Topic heatmap across years
Mark concentration by topic and exam year for this subject
Mark intensity
Amount of substance
Enthalpy changes
Bonding and structure
Amount of substance (Atoms and reactions)
Reaction rates (Physical chemistry)
Bonding and structure (Electrons, bonding and structure)
Difficulty trend
How session difficulty has shifted across recent years
Paper comparison
Marks and duration breakdown across papers in this session
H032/01 Breadth in Chemistry: H032/02 Depth in Chemistry:
Marks you can still earn
Where valid approaches outside the mark scheme may still gain credit
No data available in official reports
Practise what examiners flagged
Target weak topics from this report inside the Revui app
Enthalpy changes
28 marks this session
Practise in RevuiAmount of substance
25 marks this session
Practise in RevuiBonding and structure
15 marks this session
Practise in RevuiSelf-diagnostic checklist
Key actions before you sit this paper — copy and tick off as you revise
- 1Message
The 2023 OCR AS Level Chemistry A (H032) papers represent a demanding assessment of the specification.
- 2Message
While the multiple-choice section in H032/01 provided some accessible recall marks, the structured questions in both papers required a high level of mathematical precision and structural fluency.
- 3Message
H032/02 in particular contained multi-step mathematical problems and experimental analysis questions that challenged even top-tier candidates.
Teacher briefing pack
One-page session summary for tutors and classroom review
2023 2023
Chemistry A - H032
The 2023 OCR AS Level Chemistry A (H032) papers represent a demanding assessment of the specification. While the multiple-choice section in H032/01 provided some accessible recall marks, the structured questions in both papers required a high level of mathematical precision and s
The 2023 OCR AS Level Chemistry A (H032) papers represent a demanding assessment of the specification.
While the multiple-choice section in H032/01 provided some accessible recall marks, the structured questions in both papers required a high level of mathematical precision and structural fluency.
H032/02 in particular contained multi-step mathematical problems and experimental analysis questions that challenged even top-tier candidates.
- Total marks
- 140
- Duration
- 180 min
- Session difficulty
- 3.8 / 5
Session analysis
The 2023 OCR AS Level Chemistry A (H032) papers represent a demanding assessment of the specification. While the multiple-choice section in H032/01 provided some accessible recall marks, the structured questions in both papers required a high level of mathematical precision and structural fluency. H032/02 in particular contained multi-step mathematical problems and experimental analysis questions that challenged even top-tier candidates.
Updated Jun 14, 2026
Paper breakdown
H032/01 Breadth in Chemistry: H032/02 Depth in Chemistry:
Top chapters
Exam structure insights
Marks by chapter
See where the marks were concentrated so revision time goes to the highest-value topics.
Mark accessibility
Estimate which marks were basic, mid-level, or high-difficulty.
79% within easy or medium reach
Command word frequency
Spot common command words so answers match the expected response style.
Question type mix
Compare the mark share of each paper section and question type.
Short Answer / Calculation
108·38·77%
Multiple Choice
20·20·14%
Level of Response
12·2·9%
Study ROI
Bigger bubbles recur more often; higher bubbles carry more marks, helping you rank revision priorities.
Next-year prediction
Topics worth watching next year, with the reason shown directly below each bar.
Reaction rates
92%92%
Qualitative analysis
85%85%
Difficulty Verdict
The 2023 OCR AS Level Chemistry A (H032) papers represent a demanding assessment of the specification. While the multiple-choice section in H032/01 provided some accessible recall marks, the structured questions in both papers required a high level of mathematical precision and structural fluency. H032/02 in particular contained multi-step mathematical problems and experimental analysis questions that challenged even top-tier candidates.
Examiner notes & key calculations
- The Dilution Trap: In the Group 1 hydroxide titration calculation, a significant portion of candidates failed to scale up their calculated moles by a factor of 10 to account for the dilution from 25.0 cm³ to 250.0 cm³.
- Vague Intermolecular Terminology: In explaining why MgS MgS MgS has a higher melting point than PCl3 PCl_3 PCl3, many candidates incorrectly suggested that covalent bonds are broken during the melting of PCl3 PCl_3 PCl3, failing to distinguish between weak London/dipole forces and strong electrostatic ionic bonds.
- Radical Substitution Errors: In drawing propagation steps for 2-bromobutane, students frequently placed the radical dot on the wrong carbon atom (e.g., terminal instead of secondary position) or omitted the radical dots entirely on halogen intermediates.
Exam tips
Paper format
- Duration
- 1h 30min
- Total marks
- 70
- Weighting
- 50%
- Question types
- Structured Short Answer, Level of Response
Analysis is paraphrased for study purposes. Always verify against the official examiner report and mark scheme.