Test your readiness with IJSO-style chemistry practice questions
Apply your knowledge with our collection of IJSO-style chemistry problems.
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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.
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