Past papers are most useful when you treat them as evidence about your understanding, not as a pile of PDFs to complete. This page brings together AQA-hosted A-level Chemistry 7405 question papers and matching mark schemes from 2017 to 2022, explains what each of the three papers assesses, and shows how to turn a score into a targeted revision plan. For the newest public resources and examiner reports, check the live AQA assessment-resources page. AQA controls availability and may add or withdraw files.
This guide concerns the UK AQA A-level qualification 7405, not the separate AS qualification 7404 or Oxford AQA International A Level. Check the qualification code and paper number on each PDF before using it. A correct mark scheme for the wrong specification can teach the wrong emphasis.
Find a paper and its matching mark scheme
The links below are hosted on AQA’s filestore. Each question paper is paired with a mark scheme from the same series and paper number. All 36 original official destinations were checked during this update. The unusually timed November 2020 and November 2021 series are labelled November, not June. If a direct PDF later stops opening, use AQA’s current resource finder.
The table is a practice archive, not a promise that a listed series reflects the next exam. If you need the newest paper, examiner report or sample material, filter AQA’s current finder for qualification 7405. Some recent material can be withheld for teachers or released on a different timetable. Do not rely on third-party uploads claiming to contain an unreleased paper.
What the three AQA Chemistry papers assess
AQA’s specification at a glance states that the qualification is linear: students take the A-level examinations at the end of the course. Paper 1 assesses relevant physical and inorganic chemistry plus practical skills. Paper 2 assesses relevant physical and organic chemistry plus practical skills. Each lasts two hours, carries 105 marks and accounts for 35% of the A-level. Paper 3 may assess any content and practical skills; it lasts two hours, carries 90 marks and accounts for 30%.
Paper 3 has a distinctive structure. AQA allocates 40 marks to practical techniques and data analysis, 20 to questions testing across the specification, and 30 to multiple-choice questions. That does not make practical work irrelevant to Papers 1 and 2. The specification includes practical skills across all three papers. Students who put every practical question into a Paper 3-only folder risk missing important practice elsewhere.
The maximum written-exam total is 300 marks: 105 plus 105 plus 90. The headline percentages describe weighting, not permission to ignore a paper. Paper 3 is shorter in marks but remains substantial. Do not apply one year’s grade boundaries as though they were fixed for a future series. Boundaries and paper difficulty can vary.
The separate practical endorsement is teacher assessed. AQA’s practical-assessment guidance explains that the written-exam grade is based on the written papers while the endorsement reports practical competency separately. This does not mean practical work can be skipped: methods, data and evaluation still appear in written questions. Ask your teacher about your centre’s arrangements and required practicals.
Paper 1: physical and inorganic reasoning
Expect to connect quantitative physical chemistry with ideas such as energetics, kinetics, equilibria and electrochemistry, and to apply inorganic chemistry to unfamiliar evidence. The exact content comes from AQA’s specification, not a topic prediction blog. In a past paper, notice whether a question requests a numerical result, a chemical explanation, a balanced equation or interpretation of an observation. Those commands change what a complete answer must contain.
When practising calculations, write the relationship before substituting numbers. State units and keep sufficient significant figures during intermediate steps. If an answer looks implausible, check whether volume was converted from cubic centimetres to cubic decimetres, whether concentration refers to a diluted sample, and whether the equation’s mole ratio is actually one-to-one. A correct final number without a reproducible method is fragile understanding.
In inorganic questions, do not treat memorised colours and reactions as disconnected flashcards. Link an observation to an equation, oxidation state, electron transfer or structure. If a mark scheme accepts a precise species name, learn why that species is formed. Then test the concept under different reagents or conditions. That is more resilient than memorising one model answer.
Paper 2: organic mechanisms and physical chemistry
Paper 2 combines organic and physical chemistry. Revision should include mechanisms, synthesis decisions, interpretation of spectra and the physical principles that explain outcomes. A reaction-pathway question may require reagents, conditions, intermediates and a reason why a product forms. Practise drawing curly arrows from the electron pair or bond to the correct destination, and check charges and atom balance at each stage.
Use a reaction map to connect functional groups, but do not mistake a map for mastery. An examiner may ask you to choose a route under constraints rather than recite every conversion you know. State the starting material, intermediate, reagents and conditions for the particular route, then check that the product has the right carbon skeleton. If you cannot explain a mechanism aloud, revisit the electron movement before doing another full paper.
For spectroscopy, combine evidence rather than declaring a structure from one peak. Infrared absorption can suggest a bond, a mass spectrum can constrain molecular mass and fragments, and NMR data can distinguish environments. Write a short evidence table and eliminate candidates that contradict any strong observation. This habit is valuable when the molecule is unfamiliar.
Paper 3: practical and synoptic questions
Paper 3 rewards transferring understanding across topics and interpreting experimental evidence. A data table can test graph reading, uncertainty, unit conversion and a chemical model in one sequence. Do not begin by searching memory for a topic name. Read the variables, units and method, then identify the relationship being tested.
The multiple-choice section is not automatically easy merely because it offers options. Distractors can represent a unit error, a reversed equilibrium effect or an incorrect mechanism. Work out the answer before reading options when practical; otherwise eliminate choices using scientific reasons. Record the reason for each error in a review log so that you can distinguish a conceptual gap from rushing.
For practical and data questions, name limitations that actually affect the result. Human error is rarely a useful explanation. Identify the measurement, likely direction of bias or uncertainty, and a suitable improvement. If a titration endpoint was passed, explain how that changes the recorded volume and calculated concentration in the question’s setup. A generic statement may not earn the available marks.
Use a past paper in three passes
The first pass is an honest attempt. Choose the correct paper and series, gather permitted equipment, set a two-hour timer and work without notes. Write full workings and mark any guesses. If a whole timed paper is discouraging early in revision, start with a 30-minute section; label it as section practice instead of directly comparing its percentage to a complete paper.
The second pass is careful marking. Use the matching scheme, not one from another year or a social-media answer key. Mark in a different colour, award only points supported by the scheme and note permitted alternative wording. A mark scheme is an assessment tool, not a textbook chapter. If you do not understand why an alternative earns credit, consult the specification or ask a teacher before memorising it.
The third pass is diagnosis and repair. Categorise lost marks as knowledge, application, calculation, practical reasoning, question-reading or time management. For each recurring issue, write a next action: review an explanation, solve fresh examples, redraw a mechanism or rehearse timed data interpretation. Schedule a short retest several days later. A score that produces no change in study behaviour has limited value.
Keep an error log with paper and question, topic, original answer, reason for error, corrected reasoning and retest result. The last field matters. You may recognise a solution immediately after reading it yet still fail when a question looks different next week. Transfer to a new problem is stronger evidence of learning than recognition of an old answer.
Mark without misleading yourself
Do not award yourself a point because your sentence means roughly the same thing. Check whether a chemical species, direction, sign, condition or unit is essential. Equally, do not reject a scientifically valid alternative if the scheme explicitly permits it. For a multi-point question, identify the phrase that earns each mark rather than assigning a global impression score.
If handwriting or a diagram is ambiguous, note the uncertainty instead of automatically claiming the mark. An examiner cannot infer an absent charge or unreadable bond. Rewriting one weak response under exam conditions can help more than completing another set of easy multiple-choice questions.
Do not turn one raw percentage into a promised grade. Boundaries vary by series, and a selected practice paper might not represent the whole qualification. Track question types you can answer confidently, recurring mistakes and progress across several papers. Use official grade boundaries only as historical context.
Build revision around the specification
The AQA scheme of assessment distinguishes recalling knowledge, applying it and analysing or evaluating evidence. It includes substantial mathematical and practical demands. That is why reading notes alone cannot prepare you. You need to use ideas with unfamiliar data, explain a method and test whether a result is reasonable.
Start with a diagnostic paper or selected questions from each paper. Map errors to the relevant specification sections. Avoid labelling the entire subject weak when the pattern is narrower. For example, a low physical-chemistry score might be caused mainly by logarithmic pH calculations, equilibrium assumptions or rate-graph interpretation. A specific diagnosis allows a specific repair and a faster retest.
For foundational support on elements and trends, Sly Academy’s interactive periodic-table guide can refresh atomic number and group patterns. It does not replace the AQA specification. Students comparing exam boards can also inspect our OCR A-level Chemistry paper collection, but OCR uses a different specification. Extra questions are useful only after confirming the overlap in topic and wording.
A weekly plan can balance recall, worked examples and timed application. Early in revision, spend more time correcting concepts and completing short questions. Closer to the exam, include full papers and brief retests of past errors. Keep an older unseen paper for a later check instead of using every paper during the first week and then recalling answers from memory.
A six-week example plan
In week one, attempt diagnostic samples from Papers 1, 2 and 3. Build an error log and identify the three most costly gaps, including a practical or data skill if that is a weakness. Verify the topics against the current specification. A diagnostic is for planning, not attaching a permanent grade label.
In week two, repair the highest-impact Paper 1 concepts. Alternate concise explanations with new calculations and a few practical questions. Retest week-one mistakes without looking at their worked solutions. If accuracy improves but speed remains slow, note that separately and practise pacing without sacrificing understanding.
In week three, focus on Paper 2 pathways, mechanisms and analytical data. Draw structures from prompts rather than copying diagrams. Work through an unseen organic sequence and justify each reagent choice. Revisit physical calculations that appear in both Papers 1 and 2.
In week four, work on Paper 3 data, practical and synoptic demands. Review methods, apparatus choices, uncertainty and graph interpretation. Complete a timed multiple-choice set and explain each wrong answer, including those that were lucky guesses. Aim to identify what an option tests, not just which letter is correct.
In week five, sit full Papers 1 and 2 under timed conditions on separate days. Mark both thoroughly and spend the following day on the largest recurring error category. A high score on a familiar paper is useful feedback but not conclusive evidence of readiness.
In week six, sit a full Paper 3 and one remaining unseen paper. Shorten the error log to concepts still missed and rehearse them using fresh questions. Keep sleep and normal school commitments in the plan. Extra papers completed without marking or recovery are not automatically productive.
This schedule is an example, not an official AQA timetable. Adapt it to the time available and your teacher’s guidance. A student with a secure organic foundation may need more time on practical evaluation; another may need calculation fluency first.
Worked approaches to common question types
For a titration calculation, write the balanced reaction and identify the quantity you need. Convert measured volume to cubic decimetres before multiplying concentration by volume. Apply the mole ratio to move from titrant to unknown, account for any dilution and give the requested unit. Finally, ask whether the answer is plausible. The arithmetic changes between papers, but that decision sequence transfers.
For an equilibrium explanation, distinguish a change in the position of equilibrium from a change in reaction rate. State the disturbance, predict the system’s response and explain it with the relevant principle or equilibrium expression. A catalyst speeds the approach to equilibrium without changing the equilibrium position. If a numerical constant is requested, write the correct expression and any required units.
For an organic mechanism, identify the nucleophile, electrophile and leaving group when relevant. Show electron movement rather than memorising an unlabelled picture. Check that all product atoms can be accounted for and that charges are consistent. Then check the command: mechanism, reagent, condition and explanation of selectivity are different tasks. An accurate answer to the adjacent task can still lose marks.
For practical evaluation, separate random uncertainty from systematic bias. Repeated readings can reduce the effect of random variation but cannot fix a miscalibrated instrument. On a graph, inspect axis labels, units, scale and whether a calculated gradient has scientific meaning. Recommend an improvement addressing the actual limitation, not a generic instruction to repeat for accuracy.
For a synoptic question, resist searching for one chapter. Break the prompt into smaller parts: composition, structure, energy, rate, equilibrium and evidence may appear together. Draw a dependency chain showing what is given, what can be inferred and what must be calculated. Mixed practice matters because these links are hard to develop from isolated topic cards.
Practical skills and the endorsement
The practical endorsement evaluates competencies demonstrated through work organised by the centre. It is reported separately from the written-exam grade. That administrative distinction does not make lab work optional for exam preparation. Written papers ask about methods, data and evaluation; ignoring practical work can cost written-exam marks even though the endorsement is not included in the 300-mark written total.
Use each required practical as a reasoning exercise. Which variable is changed and which is measured? What would a control show? Which apparatus gives appropriate precision? Where might systematic error arise? What observation would contradict the hypothesis? A short notebook recording these decisions is often more useful for Paper 3 than a list of apparatus names alone.
Safety is part of good experimental reasoning. Follow teacher instructions and the risk assessment for any practical. Do not recreate an exam experiment from a PDF independently. When asked for a method improvement, select an option that is scientifically useful and safe in the stated setting.
Choose and organise papers efficiently
Download a paper and its scheme into the same dated folder or bookmark the paired links together. Label each file with the qualification, paper number and series, such as 7405 Paper 2 November 2021. This prevents marking a November answer with a June scheme. Keep your attempted script and error log with the pair. A folder of unopened PDFs is not a revision system.
Work from a recent suitable series toward older ones when you want exam-style familiarity, but check the current specification before using an older paper. Use AQA’s live finder for newer public materials and examiner reports. If an old question concerns a context no longer emphasised, practise the underlying chemistry without treating it as a forecast for the next exam.
If the same topic appears across papers, do not count a remembered answer as independent success. Space practice and change the context. After correcting an enthalpy calculation, try another with different data and a different required unknown. Being able to explain the method on new data is stronger evidence of transfer.
Ask a teacher when a scheme appears to conflict with a textbook or when several alternatives seem chemically reasonable. Mark schemes sometimes use condensed language tied to a particular question. The specification and a qualified teacher provide broader context. Copying a one-line answer without understanding its conditions can create a misconception.
Turn a paper into a topic map
After marking, list each question’s underlying knowledge and skill separately. A question about a transition-metal complex could require coordination facts, a balanced redox equation, a colour observation and a calculation. Calling the whole question inorganic chemistry conceals what failed. Make a four-column map: specification area, task type, marks lost and next practice. Group entries across multiple papers.
Use the map to set priorities. A topic that loses many marks in several contexts deserves more time than an isolated one-mark slip that you now understand. Yet a persistent basic unit-conversion error deserves attention even when each instance seems small, because it can affect many questions. Priority is about likely improvement, not just the mark value of one question.
Move from explanation to application when revisiting a topic. Read the specification statement and a worked example, close the notes and solve an unseen question. Explain why the method works and what assumption it uses. Return to the original missed question only after the fresh attempt. This order reduces learning one answer’s appearance instead of its chemistry.
Handle time pressure without guessing blindly
Two hours can disappear quickly in a paper containing long calculations, diagrams and explanations. Before a timed attempt, know the total marks and set a rough pace. Do not spend ten minutes polishing a two-mark definition while a multi-part problem remains blank. If stuck, write a scientifically meaningful first step, such as an equation, formula, labelled diagram or relevant observation, then move on and return if time permits.
Reserve several minutes for avoidable errors: absent units, signs, charges, bond placement and answers in the wrong requested form. In multiple choice, revisit questions flagged as uncertain, but change an answer only when you find a concrete reason. A last-minute feeling is not evidence. Record where time was lost as well as where marks were lost.
Use examiner reports carefully
A mark scheme states what earned credit on a particular question. An examiner report can explain why candidates commonly lost marks and which misconceptions appeared. It may identify confusion between rate and equilibrium position, or a correct formula applied with inconsistent units. Use those observations to inspect your own habits, not as a list of guaranteed future questions.
Turn each relevant report observation into a task. If candidates often fail to justify a graph interpretation, practise a three-part explanation: feature of the graph, scientific relationship and conclusion. If closely related mechanisms are confused, compare electron movement and conditions side by side. Reports are valuable when they improve a new answer.
Questions students commonly ask
Are these papers for the full A-level or AS?
The archive is for AQA A-level Chemistry 7405. AS Chemistry is qualification 7404 and has a different assessment structure. Check the code and paper number on the cover page before beginning. The Sly Academy past-papers hub lists other qualifications, but their mark schemes should never be mixed with 7405 papers. When downloading, keep the question paper and scheme from the same year and sitting together.
Is Paper 3 only about practical experiments?
No. AQA says Paper 3 can assess any specification content. It contains a section on practical techniques and data analysis, synoptic questions and multiple choice. Practical skills can also appear in Papers 1 and 2. Revise connections across the course as well as individual methods. A student who learns apparatus names but cannot interpret uncertainty or justify a conclusion is not fully prepared.
Can I still use a 2017 or 2018 paper?
Yes, an older official paper can provide valuable practice when it matches qualification 7405. Check the current specification, and mark it with the exact matching scheme. A newer unseen paper may be more informative for a final timed rehearsal, but year alone does not decide whether a question teaches something useful. Older calculations and explanations can reveal foundational gaps just as clearly as recent ones.
How many papers should I complete?
There is no magic count. One carefully marked paper that leads to a retested correction can be more useful than several rushed attempts. Aim to experience all three paper formats, include unseen questions and reserve enough time to understand why marks were lost. If you have limited time, prioritise the weaknesses revealed by a diagnostic rather than trying to collect a high number of completed PDFs. A teacher can help match the workload to the course schedule.
Where can I check the newest official files?
Use AQA’s 7405 assessment-resources finder and filter by resource type, series and paper. This guide preserves checked links for the archive above, but AQA’s current finder is the authority for newly released papers, examiner reports and access restrictions. If a link here fails later, search by qualification code and series there before using an unofficial mirror.
Should I memorise a mark scheme answer?
You should learn the scientific reason behind a credited point, including its conditions and limitations. A mark scheme is written for one question and sometimes compresses an explanation into a few words. Repeating that sentence in a different context may be wrong. After marking, write your own full explanation, then test it on an unseen question. Keep precise chemical terminology and equations, but do not confuse memorising one phrasing with understanding.
What if my scores vary greatly between papers?
Compare the mix of topics, question types and timing before assuming your ability changed suddenly. A paper with more extended calculations may expose a unit-conversion weakness, while another may reward mechanisms you know well. Look at patterns across several scripts and at whether an answer was truly independent or recalled from previous practice. Use the error log to decide the next targeted task. One unusually high or low score should not dictate a grade prediction.
A practical next step
Choose one paper from the archive and download its matching scheme. Set a realistic timer, mark your work precisely and list the three most consequential errors. For each, choose a fresh question or worked explanation that addresses the cause. Return after several days to test whether the correction transfers. The aim is not to finish every PDF; it is to recognise chemistry in an unfamiliar prompt, make a defensible calculation or explanation, and reduce repeated weaknesses before timed assessment.
