From local school exam to IChO selection camp. Prepare with free simulators, practice tests, and coming-soon study materials — all in one place.
Equilibrium jumps from just 3.3% of Local exam questions to 8.3% at the National Part I level — the exact same topic, tested far more heavily once you clear the Local round. Kinetics, Thermodynamics, and Electrochemistry are consistently the three largest categories at every level, together making up close to a third of every exam.
60 MCQ · roughly AP-Chemistry level · n = 1,500 questions
60 MCQ · notably deeper than Local · n = 1,560 questions
Free-response · 6 questions · n = 156 questions
Lab practical · 2 tasks · n = 46 questions
Interactive Labs
30+ interactive simulators covering USNCO topics — equilibrium, kinetics, electrochemistry, coordination chemistry, stereochemistry, organic mechanisms, and more.
Browse All Simulations →Interactive Study Guide
The Advanced Chemistry interactive ebook — 7 chapters covering exactly what USNCO tests beyond AP level: analytical chemistry, advanced kinetics, thermodynamics, equilibrium, electrochemistry, spectroscopy, and solid state.
Open Ebook →MCQ & FRQ Practice
Full 60-question timed Local exam sets and National Part I/III past papers with answer explanations. Build exam-level speed and accuracy.
Start Practice →Expect harder thermodynamics, coordination chemistry (crystal field theory), multi-step organic synthesis, and advanced stereochemistry on the National exam. Use the simulations to build the conceptual depth these topics demand — not just AP-level recall.
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