How many IB Chemistry topic questions should I complete each day?

There is no official daily requirement, and the appropriate number depends on the complexity of the questions. A focused set of 10 to 20 short questions, or three to five substantial Paper 2 problems, is often more useful than a large set marked superficially. Allow enough time to check the markscheme, correct your reasoning and record recurring errors. On some days, reviewing and retesting previous mistakes should replace new questions entirely. Measure progress through improved accuracy and fewer repeated errors rather than the raw number completed.

Should I study the topic before attempting IB Chemistry questions?

Use a brief review when the topic is new, but avoid repeatedly reading notes before every question set. Start by recalling definitions, equations and models from memory, then attempt the questions without support. If your answers reveal a major conceptual gap, return to notes or a worked explanation for that specific issue. You can then complete a similar question to check whether the repair worked. This approach turns questions into a diagnostic tool rather than a test taken only after extensive preparation.

When should I move from topic questions to full past papers?

Move to mixed and full-paper practice once you can answer most standard questions in several syllabus areas without prompts. You do not need to perfect every topic first, because full papers reveal weaknesses in method selection, timing and stamina. A practical progression is untimed topic questions, timed topic sets, mixed sections and then complete papers. Continue using topic questions alongside papers whenever your errors cluster around one subtopic. In the final stage of revision, full papers should become more frequent, but targeted repair should never disappear.

Are topic questions enough to prepare for IB Chemistry Paper 1B?

Topic questions help, but Paper 1B preparation must include data-based and experimental-work tasks rather than only factual recall and calculations. Practise identifying variables, processing data, interpreting graphs, considering uncertainty and evaluating procedures. Some questions should use unfamiliar contexts so that you learn to extract relevant information instead of depending on memorized examples. You should also explain conclusions with specific evidence from the supplied data. Mixed Paper 1B sections are necessary because the real assessment can connect experimental skills with several chemistry concepts.

Should I use the IB Chemistry data booklet during topic practice?

Use the current data booklet whenever it would be available under examination conditions. Regular use teaches you where equations, constants and chemical data are located, reducing wasted time during an examination. However, you still need to understand what each relationship means and when it applies. Practise identifying the required section before substituting values, and always check units and stated conditions. Definitions and core chemical reasoning should still be learned because the booklet does not replace conceptual knowledge.

What should I do if I keep getting the same type of chemistry question wrong?

Stop repeating the question unchanged and identify the exact point at which your reasoning fails. Classify the problem as missing knowledge, incorrect application, mathematics, data interpretation, notation or misunderstanding of the command term. Review one concise explanation and reconstruct the method in your own words without copying it. Then answer a different question testing the same skill, followed by another attempt several days later. If the error persists, ask your teacher, tutor or Jojo AI to examine your working step by step rather than supplying only the final answer.

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How to Use IB Chemistry Topic Questions

Daniel R.

• 29 Jul 2026•13

Join 650k+ students breezing through the IBReady to breeze through the IB?

How to Use IB Chemistry Topic Questions | RevisionDojo

Back to all posts

How to Use IB Chemistry Topic Questions

Daniel R.

• 29 Jul 2026•13

IB Chemistry topic questions are most effective when used as a repeated diagnostic cycle: review one precise subtopic, answer questions without notes, mark them strictly, classify every error, and attempt similar questions again after a delay. Simply completing large numbers of questions is not enough. Improvement comes from identifying why marks were lost and changing the underlying knowledge, method, or exam technique.

This guide explains how to build that cycle around the current IB Chemistry course, which has been assessed since 2025. It also includes a short topic-level question set with difficulty tags and a linked answer key.

Understand What IB Chemistry Topic Questions Should Cover

The current course is organized around two broad concepts: Structure and Reactivity. These are divided into six syllabus areas rather than the former sequence of numbered core topics and optional topics.

Organizing concept	Syllabus area	Main focus
Structure	Structure 1	Particles, atomic structure, electron configurations, moles and gases
Structure	Structure 2	Ionic, covalent and metallic models; materials and properties
Structure	Structure 3	Periodicity and classification of organic compounds
Reactivity	Reactivity 1	Enthalpy, energy cycles, fuels and HL spontaneity
Reactivity	Reactivity 2	Amount, rate and extent of chemical change
Reactivity	Reactivity 3	Acid-base, redox and organic reactions

The official IB Chemistry subject brief confirms that external examinations contribute 80% of the final grade. Paper 1A contains multiple-choice questions, Paper 1B contains data-based and experimental-work questions, and Paper 2 contains short-answer and extended-response questions. The remaining 20% comes from the scientific investigation.

Your topic practice should therefore include more than short calculations. A balanced set needs recall, quantitative work, data interpretation, experimental reasoning and explanations that connect several chemical ideas. The official specimen examination papers show how these skills appear in the current format.

Use a Five-Step Topic Question Cycle

1. Define a narrow target

Choose a syllabus subtopic such as S1.4 counting particles by mass or R2.2 rate of chemical change, not a broad label such as “physical chemistry.” A narrow target makes the results diagnostic because most errors can be traced to a specific concept or procedure.

The RevisionDojo IB Chemistry syllabus hub and Chemistry Questionbank organize practice according to the current Structure and Reactivity framework.

2. Retrieve before checking notes

Begin with three to five minutes of closed-book recall. Write the relevant definitions, equations, assumptions, particle models and common units from memory. Then attempt the questions without looking at worked examples.

This matters because answering questions is a form of retrieval practice, whereas rereading can create familiarity without reliable recall. Research on secondary science learning has also found that retrieval practice can be strengthened by mixing related concepts rather than always practising them in isolated blocks.

3. Mark for method, not only the final answer

For every calculation, compare your working with the markscheme line by line. Check the chemical equation, conversion to moles, substitution, units, significant figures and final conclusion. A correct answer produced through invalid reasoning should not be treated as secure understanding.

Written responses require the same care. State calls for a brief factual answer, while explain requires reasons or causes. Deduce asks you to reach a conclusion from supplied information, and evaluate requires a supported judgment about strengths and limitations.

4. Classify every lost mark

Use an error log rather than writing only a corrected answer.

Error category	Typical example	Corrective action
Knowledge	Cannot define first ionization energy	Review the definition and test it from memory
Application	Knows Le Châtelier's principle but misapplies it	Compare several changed conditions
Mathematics	Uses cm³ without converting to dm³	Add a unit-check line before substitution
Data interpretation	Describes a trend without using values	Quote data and connect it to the conclusion
Communication	Describes what happens but does not explain why	Use cause-and-effect language
Question reading	Calculates the wrong quantity	Underline the command term and requested variable

If the same error appears twice, return to concise study notes or ask Jojo AI to explain the exact step. Do not immediately start another large question set, because repeated use of a faulty method reinforces it.

5. Retest after a delay

Attempt a different question on the same weakness two or three days later. After one or two targeted rounds, mix the topic with previously studied material. This progression moves from blocked practice, which is useful when learning a method, to interleaved practice, which tests whether you can select the correct method independently.

Match Practice to Paper Style and Difficulty

Difficulty is not determined only by the amount of content involved. A question becomes harder when it removes familiar cues, combines topics or asks you to interpret an unfamiliar context.

Foundation: direct recall, one-step calculations and familiar representations.
Standard: multi-step calculations, explanations and straightforward data analysis.
Challenge: unfamiliar contexts, linked topics, experimental evaluation or HL-only content.

Start untimed while building accuracy. Once you can consistently explain the method, complete short timed sets containing Paper 1A, Paper 1B and Paper 2 styles. The topic-by-topic revision guide explains how to progress from narrow practice to mixed examination work, while the guide to earning a 7 in IB Chemistry provides a broader revision structure.

Use the current Chemistry data booklet during practice whenever it would be available in the examination. The aim is not to memorize every table but to know where information is located and how to interpret it. RevisionDojo provides an IB Chemistry data booklet resource for this purpose.

Topic-Level IB Chemistry Question Set

Attempt all questions before opening the answer key. Questions 1 to 7 are suitable for SL and HL; question 8 is HL-only.

Questions

[Foundation | Paper 1A] Which substance has the highest boiling point: CH₄, NH₃, H₂O or HF? [1]
[Foundation | Paper 2] State the full electron configuration of a phosphorus atom. [1]
[Standard | Paper 2] Magnesium reacts with hydrochloric acid according to Mg + 2HCl → MgCl₂ + H₂. Calculate the maximum mass of magnesium that reacts completely with 25.0 cm³ of 0.200 mol dm⁻³ hydrochloric acid. [3]
[Standard | Paper 1B] A student measures the time required to collect a fixed volume of gas at different reactant concentrations.

Concentration / mol dm⁻³	Time / s
0.10	80
0.20	41
0.30	27

State the relationship between concentration and the approximate initial rate, using 1/time as a measure of rate. Identify one variable that should be controlled. [2]

[Standard | Paper 2] A reaction heats 100.0 g of solution by 6.5 K. Calculate the heat transferred using q = mcΔT and c = 4.18 J g⁻¹ K⁻¹. If 0.0500 mol reacts, determine the molar enthalpy change and include its sign. Assume no heat is lost. [3]
[Challenge | Paper 2] The forward reaction in an equilibrium is exothermic. Explain the effect of increasing temperature on the equilibrium yield of products. [2]
[Standard | Paper 2] Calculate the pH of 2.5 × 10⁻³ mol dm⁻³ nitric acid, assuming complete dissociation. [2]
[Challenge | HL | Paper 2] For a reaction, ΔH = +35 kJ mol⁻¹ and ΔS = +120 J K⁻¹ mol⁻¹. Calculate the temperature above which the reaction becomes thermodynamically spontaneous under standard conditions. [3]

Answer Key

H₂O. Its molecules form an extensive hydrogen-bonded network, producing stronger overall intermolecular attractions than the alternatives.
1s² 2s² 2p⁶ 3s² 3p³.
n(HCl) = 0.200 × 0.0250 = 0.00500 mol. The 2:1 ratio gives n(Mg) = 0.00250 mol. Therefore, m = 0.00250 × 24.31 = 0.0608 g.
Doubling concentration approximately halves the time, so 1/time and therefore rate are approximately proportional to concentration. A valid controlled variable is temperature, total solution volume, gas volume collected, particle size of a solid reactant or amount of catalyst, depending on the procedure.
q = 100.0 × 4.18 × 6.5 = 2717 J = 2.72 kJ. The solution gains heat, so the reacting system releases it. ΔH = -2.72 ÷ 0.0500 = -54.3 kJ mol⁻¹.
Increasing temperature favors the endothermic reverse reaction. The equilibrium position shifts toward reactants, so the equilibrium yield of products decreases.
[H⁺] = 2.5 × 10⁻³ mol dm⁻³. Therefore, pH = -log₁₀(2.5 × 10⁻³) = 2.60.
At the threshold of spontaneity, ΔG = ΔH - TΔS = 0. Convert entropy to 0.120 kJ K⁻¹ mol⁻¹, giving T = 35 ÷ 0.120 = 292 K. The reaction is spontaneous above approximately 292 K, assuming the values remain constant.

Common Mistakes When Using Topic Questions

Do not read the answer before making a complete attempt. Recognition of a worked method is easier than independently selecting and executing it. Likewise, do not record every wrong answer as “careless,” because recurring carelessness usually indicates a specific weakness in units, algebra, notation or question reading.

Topic questions should not be your final stage of revision. They isolate weaknesses effectively, but complete examinations test topic selection, stamina and transitions between unrelated problems. Once targeted scores become stable, move to mixed sets, worked past-paper practice and full mock examinations.

Conclusion

Use IB Chemistry topic questions to diagnose learning, not merely to count correct answers. Work within a narrow syllabus area, retrieve knowledge before checking notes, mark every stage, classify lost marks and retest weaknesses after a delay. Then progress from isolated topics to mixed and timed examination practice.

RevisionDojo's Questionbank, Study Notes, data booklet support and Jojo AI can help you complete this cycle efficiently. Begin with the Questionbank for targeted practice, then use worked solutions and mixed mock material once your topic-level methods are secure.

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