USNCO 2024 Past Paper & Solutions

US National Chemistry Olympiad 2024 — Local exam: 60 multiple-choice · National exam: multiple-choice, free-response and a lab practical, Local: 110 minutes · National: three parts across the day. Scoring: Section scores combined; top performers invited to the study camp.

How to work through this paper

1. Sit the full paper timed at Local: 110 minutes · National: three parts across the day, no calculator or notes.
2. Mark it against the official key before you look at any solution.
3. Rewrite complete solutions for every question you missed or guessed — writing it out is what moves the technique into recall.
4. Tag each loss by topic (Stoichiometry, Thermodynamics, Kinetics & equilibrium, Electrochemistry, Organic & structure, Laboratory practice).
5. Re-sit the same paper one week later and compare the time to your first attempt.

Topics tested in USNCO 2024

FAQs

Where can I find the USNCO 2024 paper and answers?

The official USNCO 2024 paper and answer key are published by ACS — use the official archive link on this page. We do not re-host copyrighted papers, but our mentors walk through every question with you step by step.

How hard was the USNCO 2024 paper?

Like every year, the first section is speed-and-accuracy work and the final third carries the discrimination. Sit it timed (Local: 110 minutes · National: three parts across the day), mark it against the official key, then rewrite full solutions for anything you missed or guessed.

Can I get worked solutions for USNCO 2024?

Yes. Book a free trial session and bring the questions you are stuck on — a mentor will work through the full solution and the faster competition method, then set targeted practice on the same archetype.