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VCE Chemistry · Year 12

VCE Chemistry: what actually gets examined

Every question from 4 official VCAA papers, coded by unit, area of study and marks — so you can decide what to revise from evidence rather than a feeling.

4 VCAA papers, 2024–2026 · 328 questions · 480 marks

Three topics carry 74% of the marks in VCE Chemistry, What are the current and future options for supplying energy?, How can the rate and yield of chemical reactions be optimised? and How are organic compounds categorised and synthesised? are where the paper spends its marks. Start there.

Counted from 4 official VCAA Chemistry papers (2024–2026). 328 questions, 480 marks. Nothing estimated.

5 of 5areas of study in every paper on file
129marks in the single biggest area of study
30multiple choice marks, every paper
50%indicative share per unit, from teaching time

The command terms that carry the paper

Share of written-response questions by VCAA command term, matched against VCAA's own Glossary of command terms. Revising the content without revising the directive is how marks get lost. The lower / middle / higher grouping is ours — VCAA publishes the list but does not band it. Based on the 25% of written responses that open with a listed command term; the rest open with wording outside it, such as a direct question.

Calculate21% · 11qlower order
Identify19% · 10qlower order
State17% · 9qlower order
Explain15% · 8qmiddle order
Other11% · 6q
Name8% · 4qlower order
Discuss4% · 2q
Justify4% · 2q

Lower orderMiddle orderHigher order

Each tile is one key word; its size is that key word's share of written-response questions that open with one. The smallest 6 are grouped as Other: Compare 2% · 1q, Define 2% · 1q, Describe 2% · 1q, Evaluate 2% · 1q, Predict 2% · 1q, Suggest 2% · 1q.

Where the marks sit

Each unit with its areas of study underneath. The bar is that area of study's share of its own unit, and the chip says how many of the papers on file examined it.

Unit 3: How can design and innovation help to optimise chemical processes?

245 marks

50% indicative share, inferred from equal teaching time — not a published mark weighting

What are the current and future options for supplying energy? Every paper 129 marks

89 questions · 53% of this unit

How can the rate and yield of chemical reactions be optimised? Every paper 116 marks

64 questions · 47% of this unit

Unit 4: How are carbon-based compounds designed for purpose?

235 marks

50% indicative share, inferred from equal teaching time — not a published mark weighting

How are organic compounds categorised and synthesised? Every paper 108 marks

84 questions · 46% of this unit

How are organic compounds analysed and used? Every paper 83 marks

60 questions · 35% of this unit

How is scientific inquiry used to investigate the sustainable production of energy and/or materials? Every paper 44 marks

31 questions · 19% of this unit

Across 4 papers the units carried 245, 235 marks — against an indicative 50% share each, inferred from equal teaching time (VCAA: each unit involves at least 50 hours of scheduled classroom instruction). The VCAA VCE Chemistry Study Design 2023–2027 publishes no mark weighting; the counted share is the only measured figure.

How each area of study gets asked

The 5 biggest areas of study, by the shape of the questions actually set on them. Revising the content without revising the directive is how marks get lost — the command terms below are VCAA's own, counted from the papers.

What are the current and future options for supplying energy?

Unit 3: How can design and innovation help to optimise chemical processes? · 129 marks across 89 questions

Asked as Multiple choice ×40 · Short answer ×49

VCAA command terms Calculate ×7 · Explain ×3 · Justify ×2 · Predict ×1 · Identify ×1

How can the rate and yield of chemical reactions be optimised?

Unit 3: How can design and innovation help to optimise chemical processes? · 116 marks across 64 questions

Asked as Multiple choice ×21 · Short answer ×43

VCAA command terms Explain ×5 · Evaluate ×1 · Calculate ×1 · Discuss ×1 · State ×1 · Define ×1 · Compare ×1 · Identify ×1

How are organic compounds categorised and synthesised?

Unit 4: How are carbon-based compounds designed for purpose? · 108 marks across 84 questions

Asked as Multiple choice ×36 · Short answer ×48

VCAA command terms Name ×3 · State ×3 · Identify ×3 · Calculate ×2

How are organic compounds analysed and used?

Unit 4: How are carbon-based compounds designed for purpose? · 83 marks across 60 questions

Asked as Multiple choice ×15 · Short answer ×45

VCAA command terms Identify ×4 · State ×3 · Describe ×1 · Calculate ×1 · Name ×1 · Suggest ×1

How is scientific inquiry used to investigate the sustainable production of energy and/or materials?

Unit 4: How are carbon-based compounds designed for purpose? · 44 marks across 31 questions

Asked as Multiple choice ×8 · Short answer ×23

VCAA command terms State ×2 · Compare ×1 · Discuss ×1 · Identify ×1

What the markers wanted

Victorian Curriculum and Assessment Authority publishes examination reports after each paper. This is our reading of the 2024–2025 feedback, in our words, grouped by unit and cited to the year and question it was seen in. It describes what markers rewarded in papers already sat; it does not predict the next one. The originals are linked below.

Across the paper

  • Put each answer where the paper asks for it and keep working out of one-word answer boxes; VCAA reported responses written elsewhere on the page going unassessed and stray working invalidating otherwise correct answers.
  • Treat conditions fixed in the stem as binding: at constant temperature a temperature argument scores nothing, acidic conditions rule out hydroxide ions, and a request for names or a skeletal form is marked literally.

Unit 3: How can design and innovation help to optimise chemical processes?

Better responses

  • Running a Faraday calculation as a chain: charge from current and time, moles of electrons, the mole ratio from the half-equation, then mass or current, with a unit on the final line.
  • Solving initial-to-equilibrium problems with an ICE table and the equilibrium expression together, then converting to the quantity the stem asked for, whether concentration or amount in mol.
  • Naming the exact stress applied, the direction of the shift and how the system partially undoes the change or brings Q back to K, rather than a bare statement that equilibrium moved forward.
  • Setting out the rate-versus-yield conflict for an exothermic equilibrium and showing how a catalyst lets a lower temperature deliver a workable rate, tied to the green chemistry principle of catalysis.
  • Writing oxidation numbers with the sign first (+3, not 3+) and using the fall or rise in oxidation number to justify which species was reduced and which acted as the oxidising agent.
  • Judging a production route with two green chemistry principles backed by the data supplied, such as atom economy, waste products and energy demand, then adding an ethical factor and a conclusion.

Where marks were lost — and how to keep them

  • Keeping the energy released positive: carrying the negative sign of an exothermic ΔH into q = mcΔT gives a negative energy or a temperature fall, and both were marked wrong in 2024 and 2025.
  • Unit discipline in thermochemistry and gas stoichiometry: convert m3 and mL to litres, subtract an initial gas volume, state a unit when the stem gives none, and round to the significant figures requested.
  • Writing the half-equation for what actually reacts at each electrode, in alkaline or acidic form as the cell dictates, with states and a single-headed arrow; sketching the cell first avoided naming the wrong species.
  • Explaining calorimeter calibration: energy also heats the calorimeter itself, so q = mcΔT alone under-reads, and a result that is too high needs a specific cause such as a calibration factor below its true value.
  • Applying the electrochemical series to electrolysis: a stronger oxidant such as H+ can be reduced ahead of the target metal, and non-standard concentrations or a high voltage can make chloride oxidise to chlorine.
  • Saying how a pressure increase is achieved: only a volume reduction shifts the position, since an inert gas raises pressure without changing any concentration, and the reasoning must fit the particle count on each side.

Seen in 2025 Q1, 2025 Q2, 2025 NHT Q2, 2025 Q3, 2025 NHT Q4, 2025 NHT Q5, 2025 NHT Q6, 2025 Q7, 2025 NHT Q7, 2025 NHT Q9, 2025 NHT Q10, 2024 Q3, 2024 Q4, 2024 Q5, 2024 Q7, 2024 Q8.

Unit 4: How are carbon-based compounds designed for purpose?

Better responses

  • Reading a 13C NMR spectrum as environments: fewer peaks than carbon atoms points to equivalent carbons, and so to symmetry or branching, before any structure is proposed.
  • Converting 1H NMR integration into a whole-number hydrogen ratio and reading a six-hydrogen signal near 1 ppm as two equivalent methyl groups, then checking the deduced structure against the molecular formula.
  • Calculating percentage yield and percentage atom economy as separate quantities and comparing both routes, then naming atom economy, not yield, as the green chemistry principle at stake.
  • Explaining enzyme and drug action through shape: a pH change alters protonation and the bonding between polar groups, reshaping the active site, while a single enantiomer or a protonated inhibitor binds it best.
  • Comparing boiling points through intermolecular forces: carboxylic acids offer more hydrogen-bonding sites and form dimers, unlike alcohols or amines, so more energy is needed to separate their molecules.
  • Using melting point properly: a narrow range signals purity, while closeness to the literature value, or an unchanged melting point after mixing with a pure sample, establishes identity.

Where marks were lost — and how to keep them

  • Drawing in the convention requested: a skeletal formula when asked, a semi-structural formula with the terminal hydroxyl written CH2OH rather than OHCH2, and IUPAC names when the stem asks for names, not formulas.
  • Mass spectrometry conventions: m/z is a label rather than a unit, a fragment is written in square brackets with a single positive charge, and the two chlorine isotopes explain the parent ion and an isotope fragment.
  • Justifying structural features from peak count, splitting and integration ratios; in 2025 arguments resting on chemical shift values alone earned nothing, and 2024 answers rarely tied the ratios to the structure.
  • Inquiry vocabulary in the analysis question: resolution is the smallest graduation with its unit, averaging reduces the effect of random error rather than the error, and a hypothesis verdict must cite the graph or data.
  • Volumetric stoichiometry with the mole ratio from the paired half-equations, every dilution and aliquot step included, and the permanganate end point as the first lasting purple tint rather than pink.
  • Choosing a test that detects the compound itself: limewater only shows the CO2 formed once a carboxylic acid meets a carbonate, group 1 metals react with any labile hydrogen, and dichromate ignores tertiary alcohols.

Seen in 2025 NHT Q1, 2025 NHT Q3, 2025 Q4, 2025 Q5, 2025 Q6, 2025 NHT Q8, 2025 NHT Q9, 2024 Q1, 2024 Q2, 2024 Q3, 2024 Q6, 2024 Q8, 2024 Q9.

Lowest-scoring questions, by average mark

Read from the VCAA examination reports, which print the mark distribution for every question. Average mark out of the marks available, and the share of students who scored zero.

YearQuestionAverageScored 0What it asked for
2025Q4(c)(iii)0.1 / 190%The fragment-ion formula had to show the heavier chlorine isotope and carry a single positive charge.
2024Q7(a)(iii)0.1 / 194%The bare label non-spontaneous scored zero; a concrete cause, such as hydrogen gas leaving the electrode, was needed.
2024Q8(b)(iv)0.2 / 286%Instrument resolution: a burette's resolution is its graduation interval, not half of it, and both values needed units.
2025Q2(b)0.4 / 266%Commercial electroplating needs a constant electrolyte concentration, with the anode and cathode roles named explicitly.
2025Q4(f)(i)0.2 / 185%A skeletal structure was required; a correct isomer drawn in any other convention scored zero.
2025Q5(a)(ii)0.4 / 268%Why HPLC conditions must be held constant: retention times drift, so peak areas and the calibration curve lose validity.
2025Q6(b)0.2 / 178%The permanganate end point is the first lasting purple tint; pink is the colour of Mn2+ and was not accepted.
2025Q6(f)0.2 / 183%A one-line percentage-reduction calculation carried forward from the titration result; very few completed it.
2025 NHT VCAA examination report →2025 VCAA examination report →2024 VCAA examination report →

How the paper is built

Marks by question format across the same 4 papers.

Multiple choice 12030 / 30 / 30 / 30 per paper
Short answer 36090 / 90 / 90 / 90 per paper

Multiple choice is exactly 30 marks in every paper and short answer is exactly 90 marks in every paper.

Every question, by area of study

All 328 questions from the 4 papers, listed under the area of study each was coded to — year, question number, marks as printed on the paper, command term and format — with VCAA's own copy of the paper linked on every row. The questions themselves are read there, not here. Open a unit to see its list.

Unit 3: How can design and innovation help to optimise chemical processes?153 questions · 245 marks · show

What are the current and future options for supplying energy? · 89 questions, 129 marks

How can the rate and yield of chemical reactions be optimised? · 64 questions, 116 marks

Unit 4: How are carbon-based compounds designed for purpose?175 questions · 235 marks · show

How are organic compounds categorised and synthesised? · 84 questions, 108 marks

How are organic compounds analysed and used? · 60 questions, 83 marks

How is scientific inquiry used to investigate the sustainable production of energy and/or materials? · 31 questions, 44 marks

The papers this is counted from

Victorian Curriculum and Assessment Authority publishes every paper and its marking guidelines. These links go to VCAA's own copies — read the questions there.

2024 VCAA paper · 120 marks →2025 VCAA paper · 120 marks →2025 NHT VCAA paper · 120 marks →2026 NHT VCAA paper · 120 marks →

These are the external examination papers. They are not the whole subject: Chemistry is also assessed by School-assessed Coursework set and marked by your school, which VCAA does not publish — so nothing on this page covers that part of your result.

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Frequently Asked Questions

Which VCE Chemistry areas of study come up every year?

5 of the 5. Every area of study marked "Every paper" above was examined in all 4 papers on file. That describes the papers analysed, not a prediction — examiners set each paper fresh.

Which VCE Chemistry unit is worth the most marks?

Unit 3: How can design and innovation help to optimise chemical processes? 245, Unit 4: How are carbon-based compounds designed for purpose? 235 marks across the 4 papers analysed. The syllabus publishes no mark weighting for them; the indicative share on this page is inferred from equal teaching time (VCAA: each unit involves at least 50 hours of scheduled classroom instruction), and the counted share is a different measure.

What is the biggest single area of study in VCE Chemistry?

What are the current and future options for supplying energy?, with 129 of the 480 marks counted across 4 papers.

How was this analysed?

Every question in 4 official VCAA VCE Chemistry papers (2024–2026) was counted against the VCAA VCE Chemistry Study Design 2023–2027: its mark value, its format and its key word, and the unit and area of study it assesses. Marks are reconciled against each paper's own stated total.

Are the exam questions reproduced here?

No. Victorian Curriculum and Assessment Authority owns the papers. This page publishes counts and links to VCAA's own copy of each paper so you can read the questions at the source. The analysis is ours; the papers stay with VCAA.

Does this predict what will be in my exam?

No, and it is not meant to. It describes what has been set. Examiners write each paper fresh and can weight a neglected area of study heavily, which is why every area of study is listed here, including the ones examined least.

Can I see which VCE Chemistry questions were set on each area of study?

Yes. Every question from the 4 papers is listed above under the area of study it was coded to, with its year, question number, marks and command term, and a link to VCAA's copy of that paper. The question itself is read there, not here.

What did the VCAA markers say about VCE Chemistry?

Victorian Curriculum and Assessment Authority publishes marker feedback after each paper. The "What the markers wanted" section above is our reading of it across 2 years, in our words, grouped by unit and cited to the year and question it was seen in, with the originals linked.

Coded against the VCAA VCE Chemistry Study Design 2023–2027. Where a question is coded to more than one area of study its marks are split evenly, so area of study totals within a unit can round a mark or two above the unit total. A area of study is marked "Every paper" when it appears in all 4, "Most papers" when it is missing from one, and "Comes and goes" when it is missing from more — the one-paper tolerance absorbs a single coding miss rather than publishing it. Last updated 2026-09-01 · Exam papers © Victorian Curriculum and Assessment Authority, linked at source.