Test your readiness with IJSO-style chemistry practice questions
Apply your knowledge with our collection of IJSO-style chemistry problems.
View Practice QuestionsChemistry
Dive into atoms, reactions, and the molecular magic that powers everything around us. Designed for IJSO excellence.
Chemical Structures
Explore atoms, bonds, molecular shapes, and the foundations of how matter is built.
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Stoichiometry
Master the quantitative side of chemistry — from moles to limiting reactants and yields.
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Chemical Reactions
Understand how substances transform through synthesis, decomposition, and displacement.
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Thermochemistry
Discover how heat and energy flow through chemical processes and physical changes.
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Chemical Kinetics
Learn what controls the speed of reactions, from concentration to catalysts.
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Chemical Equilibrium
Study how reversible reactions balance out and respond to changing conditions.
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Electrochemistry
Dive into redox reactions, voltaic and electrolytic cells, and the chemistry of electricity.
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Other Topics
Additional concepts like radioactivity, spectrophotometry, and introductory organic chemistry.
Explore TopicTest your readiness with IJSO-style chemistry mock tests
Simulate the real exam experience with full-length chemistry mock tests crafted in the spirit of the IJSO.
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