Free GCSE chemistry practice for Year 11, nine months out from the May/June 2027 exams. Every question below comes from GradeNinja's own bank - 2,161 Chemistry questions across 48 topics.
Chemistry splits into things you must know cold (ionic and covalent bonding, the reactivity series, formulae) and things you must be able to do (moles, balancing, calculations). Those need different revision, and mixing them up is why people plateau.
Test the recall half with quick questions, and drill the calculation half the way you would drill maths - repeatedly, with a pen.
Our Chemistry questions follow the AQA specification. If your school uses a different board most of the content still overlaps, but check your own spec.
Answer before you open the explanation. The moment of not-quite-knowing is the part that does the work, and skipping to the answer skips the learning.
Anything you get wrong, come back to tomorrow rather than immediately. Getting it right straight after seeing the answer proves nothing.
Real questions from GradeNinja's own bank, with the answer and the explanation the app gives. Tap to reveal.
It placed positive charge spread throughout the atom, but Rutherford showed charge is concentrated in a tiny nucleus
Thomson's plum pudding model showed electrons (the "plums") embedded in a spread-out ball of positive charge (the "pudding"). Rutherford's gold foil experiment showed that most of the atom is empty space and almost all the positive charge is concentrated in a tiny nucleus.
When existing rocks are transformed by heat and/or pressure (without melting)
Metamorphic rocks form when existing rocks (igneous, sedimentary or other metamorphic) are subjected to high heat and/or pressure without completely melting. Examples: limestone → marble, mudstone → slate, granite → gneiss.
It is unchanged at the end of the reaction
A catalyst speeds up a reaction by providing an alternative pathway with lower activation energy. Crucially, it is not consumed and can be recovered unchanged after the reaction.
Bronze
Bronze is an alloy of copper and tin. Brass is an alloy of copper and zinc, and steel is mainly iron with carbon and other elements.
Compound breaks down on heating
Thermal decomposition = breaking a compound by heating (without oxygen).
It uses a renewable resource (sugar/glucose) and does not depend on crude oil
Fermentation uses glucose from plants (a renewable resource): C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂. Hydration of ethene (ethene + steam → ethanol) uses ethene derived from crude oil (non-renewable). However, fermentation produces impure ethanol at ~37°C, while hydration gives purer product more rapidly.
0.75
Rf = distance of spot ÷ distance of solvent front = 9 ÷ 12 = 0.75.
Decreases
Reactivity decreases down Group 7. As atoms get larger, the outer shell is further from the nucleus and shielded by more inner electrons, making it harder to attract an extra electron.
55,718 questions across 28 subjects, XP, boss battles and friend challenges. No card needed.
Start revising free →Short, frequent sessions of active recall beat long sessions of re-reading. Test yourself, check, and revisit anything you got wrong a day or two later rather than immediately.
AQA. Content overlaps heavily between boards, so they are still useful on another spec, but check your own specification for anything board-specific.
GCSEs are sat across May and June, so for the current Year 11 that means May/June 2027. Exact paper dates come from the exam boards and your school.
2,161 in Chemistry alone, and 55,718 across 28 subjects. Signing up is free.