Free A-level Chemistry Practice: Questions by Topic & Timed Mocks

A-level Chemistry has a reputation for being one of the harder A-levels, and there is some truth to it — the content is dense, the maths is unavoidable, and the exams reward genuine understanding rather than memorised facts. The good news is that it is also one of the most practisable subjects there is, because almost every idea turns up as a recognisable question type. The more exam-style questions you work through, the more the patterns become familiar. This guide explains how A-level Chemistry is assessed, what it covers, and how to revise efficiently using free A-level Chemistry practice questions sorted by topic.

How A-level Chemistry is assessed

A-level Chemistry is a two-year linear course, which means the assessment all happens at the end rather than being spread across modules you bank as you go. There are two parts to it: the written exams and a separate practical endorsement.

The written side is three exam papers sat at the end of the second year. Between them they cover the whole specification, and they mix multiple-choice, short-answer and extended-response questions. Crucially, at least 20% of the marks across the papers are mathematical — moles calculations, rearranging equations, working with logs for pH, interpreting graphs and so on — so being comfortable with the numbers is not optional.

Alongside the exams sits the practical endorsement. This is reported separately on your certificate as either pass or not classified, and it does not contribute to your A*–E grade. It is assessed by your teachers across a set of required practicals during the course. It is worth knowing that practical skills are also tested in the written papers, so the lab work and the exams are not as separate as they first appear.

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What the course covers

Whichever board you sit, the content falls into three broad strands that run through the whole qualification:

• Physical chemistry — the quantitative, theory-heavy core: atomic structure, bonding, energetics, kinetics, equilibria, acids and bases, and thermodynamics.
• Inorganic chemistry — periodicity and the behaviour of the elements, including Group 2, the halogens, period 3 and the transition metals.
• Organic chemistry — carbon compounds and their reactions, mechanisms, analysis and spectroscopy, building from simple alkanes up to aromatic compounds and polymers.

The boards organise and name these slightly differently, and there are small differences in emphasis, but the underlying chemistry is the same. If you understand the concept, you can answer the question regardless of which logo is on the paper.

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Practising by topic

One of the most effective ways to revise Chemistry is to drill one topic at a time rather than skating across everything at once. PassNova's A-level Chemistry course is built around exactly that — 160 exam-style questions split across 16 topics, each with a worked explanation. The topics are:

• Atomic structure & periodicity
• Amount of substance (moles, formulae and equations)
• Bonding and structure
• Energetics (enthalpy changes)
• Kinetics (reaction rates)
• Equilibria and K_c
• Acids & bases (pH, K_a and buffers)
• Redox & electrochemistry
• Inorganic chemistry (the groups and period 3)
• Organic chemistry (mechanisms and functional groups)
• Transition metals
• Organic analysis & spectroscopy
• Aromatic chemistry
• Carbonyls & carboxylic acids
• Amines, amino acids & polymers
• Born–Haber cycles & entropy

Working topic by topic means you can see clearly where you are solid and where you are shaky. If equilibria or Born–Haber cycles keep catching you out, you can drill those specifically instead of re-testing the things you already know. The explanations do a lot of the heavy lifting here: getting an answer wrong and understanding why is how the chemistry actually sticks — especially for the maths-heavy topics, where it is usually one step in the method that trips you up.

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How to revise efficiently with free practice

You do not need endless hours to make real progress — you need to use the time well. A sensible approach looks like this:

1. Start in study mode. Work through questions at your own pace, reading the explanation after each one. The goal here is learning, not scoring. Cover every topic at least once so nothing is a complete surprise later.
2. Drill your weak topics. Once you know where the gaps are, focus your practice there. A reliable way to improve a grade is to turn two or three weak topics into solid ones.
3. Move on to timed mocks. When the material feels familiar, sit a full timed mock paper under exam conditions. PassNova includes 6 timed mock papers that build the pacing and stamina the real exams demand.
4. Review every explanation. After each mock, go back over the questions you got wrong and the ones you guessed. That review is where the real gains are — not in the score itself.

Because so much of the assessment is mathematical, treat calculation questions as a skill to rehearse, not just facts to remember. Write out the full method every time — units, significant figures and all — so that under exam pressure the steps come automatically.

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Common pitfalls to avoid

A few mistakes come up again and again in A-level Chemistry:

• Avoiding the maths. Skipping calculation practice because it feels uncomfortable is the single most common way to leave marks on the table. With at least a fifth of the marks mathematical, the numbers have to be a strength.
• Memorising mechanisms instead of understanding them. Organic mechanisms reward understanding the why — where the curly arrows start and finish — rather than copying a diagram from memory. Examiners change the molecule, not the logic.
• Neglecting the practical skills. Practical knowledge is tested in the written papers too, so do not treat the required practicals as separate from your revision.
• Never practising under time pressure. If you only ever work untimed, the real clock can throw you. Sit a few mocks under proper timed conditions before the day.

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How it fits with your other A-levels

Chemistry is rarely taken on its own — it pairs naturally with biology, maths and physics, and it is a common requirement for medicine, dentistry, veterinary and many science degrees. If you are revising more than one science, the same study-then-mock routine works across all of them. You can practise alongside it for free on PassNova too, for example with A-level Biology, so all your revision sits in one place.

It is worth being clear on one point: PassNova provides free practice only. We are not an exam board and we do not set or mark the real papers — our job is simply to get you ready so that when you sit the actual exam, it feels familiar. For the definitive rules on grading, the specification and the practical endorsement, the official regulator is Ofqual, and your exam board publishes the full specification you are sitting.

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The bottom line

A-level Chemistry rewards steady, focused preparation more than last-minute cramming. The shape of it is clear — three written papers, a separate practical endorsement, a fifth of the marks mathematical, and three strands of physical, inorganic and organic chemistry running throughout. Work through study mode topic by topic, drill your weak areas, sit a few timed mocks and review every mistake, and you will walk in knowing exactly what to expect. Start practising for free today, with no sign-up and a worked explanation on every question.