WJECAS/A Level21 resources

WJEC AS/A Level Chemistry Past Papers & Mark Schemes

Free WJEC A Level Chemistry past papers & mark schemes. Units 1–5 including practical exam. Physical, inorganic, and organic chemistry. 89 resources.

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21 of 21 resources

Summer 2023

3 files
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AS/A Level Chemistry – Unit 3: Written: Physical and Inorganic Chemistry – Past Paper – Summer 2023

Past Paper

AS/A Level Chemistry – Unit 3: Written: Physical and Inorganic Chemistry – Mark Scheme – Summer 2023

Mark Scheme

AS/A Level Chemistry – Unit 4: Written: Organic Chemistry and Analysis – Mark Scheme – Summer 2023

Mark Scheme

Summer 2022

4 files
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AS/A Level Chemistry – Unit 3: Written: Physical and Inorganic Chemistry – Past Paper – Summer 2022

Past Paper
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AS/A Level Chemistry – Unit 4: Written: Organic Chemistry and Analysis – Past Paper – Summer 2022

Past Paper

AS/A Level Chemistry – Unit 3: Written: Physical and Inorganic Chemistry – Mark Scheme – Summer 2022

Mark Scheme

AS/A Level Chemistry – Unit 4: Written: Organic Chemistry and Analysis – Mark Scheme – Summer 2022

Mark Scheme

Summer 2019

6 files

AS/A Level Chemistry – Unit 4: Written: Organic Chemistry and Analysis – Mark Scheme – Summer 2019

Mark Scheme
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AS/A Level Chemistry – Unit 4: Written: Organic Chemistry and Analysis – Past Paper – Summer 2019

Past Paper
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AS/A Level Chemistry – Unit 3: Written: Physical and Inorganic Chemistry – Past Paper – Summer 2019

Past Paper

AS/A Level Chemistry – Unit 3: Written: Physical and Inorganic Chemistry – Mark Scheme – Summer 2019

Mark Scheme

AS/A Level Chemistry – Unit 4: Written: Organic Chemistry and Analysis – Mark Scheme – Summer 2019

Mark Scheme

AS/A Level Chemistry – Unit 3: Written: Physical and Inorganic Chemistry – Mark Scheme – Summer 2019

Mark Scheme

Summer 2018

4 files
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AS/A Level Chemistry – Unit 4: Written: Organic Chemistry and Analysis – Past Paper – Summer 2018

Past Paper
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AS/A Level Chemistry – Unit 3: Written: Physical and Inorganic Chemistry – Past Paper – Summer 2018

Past Paper

AS/A Level Chemistry – Unit 4: Written: Organic Chemistry and Analysis – Mark Scheme – Summer 2018

Mark Scheme

AS/A Level Chemistry – Unit 3: Written: Physical and Inorganic Chemistry – Mark Scheme – Summer 2018

Mark Scheme

Summer 2017

4 files
📄

AS/A Level Chemistry – Unit 4: Written: Organic Chemistry and Analysis – Past Paper – Summer 2017

Past Paper
📄

AS/A Level Chemistry – Unit 3: Written: Physical and Inorganic Chemistry – Past Paper – Summer 2017

Past Paper

AS/A Level Chemistry – Unit 4: Written: Organic Chemistry and Analysis – Mark Scheme – Summer 2017

Mark Scheme

AS/A Level Chemistry – Unit 3: Written: Physical and Inorganic Chemistry – Mark Scheme – Summer 2017

Mark Scheme

WJEC A Level Chemistry: From Atomic Structure to Organic Synthesis, with a Standalone Practical Exam

WJEC A Level Chemistry is structured across five units that build from foundational principles to advanced organic chemistry and analytical techniques. Like WJEC Biology, the specification includes a standalone practical examination (Unit 5), which sets it apart from boards that assess practical competence through a separate endorsement. Unit 1 (The Language of Chemistry, Structure of Matter and Simple Reactions) establishes core concepts: atomic structure, bonding, the mole, redox reactions, and the periodic table. Unit 2 (Energy, Rate and Chemistry of Carbon Compounds) introduces thermodynamics, kinetics, chemical equilibrium, and an initial survey of organic chemistry covering alkanes, alkenes, halogenoalkanes, and alcohols. Unit 3 (Physical and Inorganic Chemistry) at A2 extends into entropy, electrochemistry, transition metal chemistry, and equilibrium constants (Kp and Kc). Unit 4 (Organic Chemistry and Analysis) covers aromatic chemistry, amines, amino acids, polymers, and spectroscopic analysis (mass spectrometry, IR, NMR). Unit 5 tests practical skills through a controlled examination. With 89 resources spanning both standard and accessible-format papers across multiple sessions, the archive provides thorough coverage of the entire specification.

Exam Paper Structure

Unit 1

Language of Chemistry, Structure and Simple Reactions (AS)

1 hour 30 minutes🎯 80 marks📊 20% of grade
Atomic structure and the periodic tableBonding and structureThe mole and stoichiometryRedox reactions
Unit 2

Energy, Rate and Carbon Compounds (AS)

1 hour 30 minutes🎯 80 marks📊 20% of grade
ThermodynamicsKinetics and equilibriumOrganic chemistry: alkanes to alcohols
Unit 3

Physical and Inorganic Chemistry (A2)

1 hour 45 minutes🎯 80 marks📊 25% of grade
Entropy and free energyElectrochemistryTransition metalsEquilibrium constants
Unit 4

Organic Chemistry and Analysis (A2)

1 hour 45 minutes🎯 80 marks📊 25% of grade
Aromatic chemistryAmines and amino acidsPolymersSpectroscopic analysis
Unit 5

Practical Examination (A2)

Varies🎯 marks📊 10% of grade
Experimental techniqueData recording and analysisEvaluation of results

Key Information

Exam BoardWJEC
Specification CodeWJEC A Level Chemistry
QualificationAS/A Level
Grading ScaleA*–E (A Level) / A–E (AS)
Assessment Type4 written exams + 1 practical exam
TiersNone
Number Of Papers5
Exam DurationVaries by unit
Total MarksVaries by unit
Calculator StatusCalculator permitted
Total Resources89

Key Topics in Chemistry

Topics you need to know

Atomic structure, electron configuration, and periodic trendsBonding — ionic, covalent, metallic, and intermolecular forcesOrganic mechanisms — substitution, addition, eliminationThermodynamics — enthalpy, entropy, and Gibbs free energyTransition metal chemistry — complex ions, catalysis, and colourSpectroscopic analysis — mass spec, IR, and NMR

Exam Command Words

Command wordWhat the examiner expects
CalculateDetermine a numerical answer showing all working
DrawProduce a diagram, structure, or mechanism with appropriate detail
ExplainGive chemical reasons linking observations to underlying principles
SuggestApply chemical knowledge to an unfamiliar context

Typical Grade Boundaries

GradeApproximate mark needed
A*80–90%
A70–79%
B60–69%
C50–59%
D40–49%
E30–39%

⚠️ Boundaries vary by session. Check WJEC’s website for exact figures.

Mole Calculations, Organic Mechanisms, and Spectral Interpretation for WJEC Chemistry

WJEC Chemistry papers consistently test quantitative skills. Mole calculations, concentration conversions, enthalpy changes, and equilibrium expressions appear across all units. Create a master sheet of the key formulae (n = m/M, c = n/V, pV = nRT, ΔH = Σbonds broken – Σbonds formed) and practise applying them to multi-step problems where the answer to one calculation feeds into the next. Organic mechanisms are examined in detail. For each reaction type (nucleophilic substitution, electrophilic addition, elimination, condensation, hydrolysis), learn the mechanism’s curly arrows, the conditions required, and how to identify the mechanism from the reagents given. WJEC mark schemes award individual marks for each correctly drawn curly arrow, so precision matters. Spectroscopic analysis in Unit 4 requires you to interpret mass spectra (identifying the molecular ion and fragmentation patterns), infrared spectra (recognising O–H, C=O, N–H absorptions), and NMR spectra (counting peaks, interpreting chemical shifts, and splitting patterns). Practise with at least ten worked examples before the exam. The practical examination demands familiarity with standard laboratory techniques: titration, distillation, filtration, chromatography, and volumetric analysis. Review the uncertainty calculations and significant figures conventions that WJEC expects, as these carry dedicated marks.

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