Cambridge GCSE Chemistry revision

Topic 1: States of matter

We will go through it step by step.

1. 1.1States of matter, the particle model and changes of state70 questions

Topic 2: Atoms, elements and compounds

There are 5 parts: we start with atoms, elements and isotopes, and finish with structures and properties of materials.

1. 2.1Atoms, elements and isotopesFree 58 questions
2. 2.2Electronic structure and electron configurations66 questions
3. 2.3Relative atomic mass and isotopic abundance31 questions
4. 2.4Ionic, covalent and metallic bondingFree 21 questions
5. 2.5Structures and properties of materials25 questions

Topic 3: Stoichiometry

There are 7 parts: we start with writing and balancing chemical equations, state symbols and ionic equations, and finish with the practical on acid–alkali titration and titration calculations.

1. 3.1Writing and balancing chemical equations, state symbols and ionic equations43 questions
2. 3.2Relative formula mass, percentage composition and empirical and molecular formulae47 questions
3. 3.3Conservation of mass and the moleFree 59 questions
4. 3.4Reacting masses, concentration and yield62 questions
5. 3.5Limiting reactants and using moles to balance equations52 questions
6. 3.6Molar volume and calculations involving gases56 questions
7. 3.7Required practical: acid–alkali titration and titration calculations58 questions

Topic 4: Electrochemistry

There are 2 parts: we start with the practical on electrolysis of aqueous solutions, and finish with cells and fuel cells.

1. 4.1Required practical: electrolysis of aqueous solutions64 questions
2. 4.2Cells and fuel cells22 questions

Topic 5: Chemical energetics

There are 3 parts: we start with exothermic and endothermic reactions, and finish with the practical on investigating temperature changes in reacting solutions.

1. 5.1Exothermic and endothermic reactionsFree 57 questions
2. 5.2Reaction profiles, activation energy and bond energy calculations54 questions
3. 5.3Required practical: investigating temperature changes in reacting solutions59 questions

Topic 6: Chemical reactions

There are 7 parts: we start with rates of reaction, and finish with oxidation and reduction (redox) in terms of oxygen, electrons and displacement.

1. 6.1Rates of reactionFree 63 questions
2. 6.2Calculating rates of reaction: mean rates and tangents on graphs62 questions
3. 6.3Required practical: rate of reaction by gas volume or mass loss66 questions
4. 6.4Required practical: rate of reaction by turbidity (sodium thiosulfate and hydrochloric acid)53 questions
5. 6.5Reversible reactions and equilibrium19 questions
6. 6.6The Haber process and choosing industrial conditions62 questions
7. 6.7Oxidation and reduction (redox) in terms of oxygen, electrons and displacement59 questions

Topic 7: Acids, bases and salts

There are 4 parts: we start with acids, bases and electrolysis, and finish with the practical on preparing a pure, dry sample of a soluble salt.

1. 7.1Acids, bases and electrolysis37 questions
2. 7.2Strong and weak acids, pH and hydrogen ion concentration51 questions
3. 7.3Solubility rules and precipitation reactions21 questions
4. 7.4Required practical: preparing a pure, dry sample of a soluble salt21 questions

Topic 8: The Periodic Table

There are 5 parts: we start with the periodic table and groups, and finish with development of the periodic table and metals versus non-metals.

1. 8.1The periodic table and groups67 questions
2. 8.2Group 1: the alkali metals and their reactions35 questions
3. 8.3Groups 7 and 0: the halogens, displacement reactions and the noble gases60 questions
4. 8.4Transition metals: properties and uses22 questions
5. 8.5Development of the periodic table and metals versus non-metals71 questions

Topic 9: Metals

There are 4 parts: we start with reactivity of metals and extraction, and finish with sustainable metal extraction.

1. 9.1Reactivity of metals and extractionFree 25 questions
2. 9.2Alloys, ceramics, composites and polymers as materials47 questions
3. 9.3Corrosion, rusting and its prevention31 questions
4. 9.4Sustainable metal extraction: bioleaching, phytomining and recycling metals26 questions

Topic 10: Chemistry of the environment

There are 6 parts: we start with earth's resources and potable water, and finish with carbon footprint and reducing greenhouse gas emissions.

1. 10.1Earth's resources and potable waterFree 27 questions
2. 10.2Required practical: analysis and purification of water samples65 questions
3. 10.3Fertilisers and NPK compounds29 questions
4. 10.4Atmospheric pollutants19 questions
5. 10.5The atmosphere and climate changeFree 23 questions
6. 10.6Carbon footprint and reducing greenhouse gas emissions68 questions

Topic 11: Organic chemistry

There are 6 parts: we start with crude oil and hydrocarbons, and finish with naturally occurring polymers.

1. 11.1Crude oil and hydrocarbonsFree 26 questions
2. 11.2Cracking of hydrocarbons: catalytic and steam cracking22 questions
3. 11.3Alkenes, alcohols and polymers26 questions
4. 11.4Carboxylic acids and esters34 questions
5. 11.5Condensation polymerisation (polyesters and polyamides)32 questions
6. 11.6Naturally occurring polymers: amino acids, proteins, DNA, starch and cellulose51 questions

Topic 12: Experimental techniques and chemical analysis

There are 6 parts: we start with the practical on techniques and apparatus (measuring, heating, gas collection, safety), and finish with the practical on identifying unknown ions (flame tests, precipitates, anion tests).

1. 12.1Practical techniques and apparatus (measuring, heating, gas collection, safety)73 questions
2. 12.2Mixtures and separation techniques (filtration, crystallisation, simple and fractional distillation)77 questions
3. 12.3Purity, formulations and chromatographyFree 63 questions
4. 12.4Required practical: paper chromatography, Rf values and analysis of inks65 questions
5. 12.5Identifying gases and ions65 questions
6. 12.6Required practical: identifying unknown ions (flame tests, precipitates, anion tests)24 questions

Topic P: Practical skills (Papers 5 and 6)

There are 4 parts: we start with planning investigations, and finish with chemistry calculations.

1. P.1Planning investigations: variables, hypotheses and risk assessment37 questions
2. P.2Presenting data: tables, graphs, significant figures and standard form28 questions
3. P.3Uncertainty, accuracy, precision, repeatability and evaluating results36 questions
4. P.4Chemistry calculations: ratios, percentages, unit conversions and rearranging equations44 questions

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