Register for NCT
Choose your exam and compete against chemistry students nationwide. Both exams are 100% free.
Start Here
February 22, 2026
NCT Open
General chemistry with Honors & Advanced divisions.
- 60 multiple-choice questions
- 110 minutes
- Honors & Advanced divisions
- Based on coursework level
Recommended for most students
Register for NCT OpenAdvanced
March 28, 2026
NCT Challenge
Our advanced exam for students with strong chemistry backgrounds.
- 60 or 72 questions (by division)
- 90 minutes
- Standard & Elite divisions
- Self-selected challenge level
For students with college-level chemistry backgrounds
Register for NCT ChallengeCan I register for both exams?
Yes! Many students take both. NCT Open is in February and serves as great practice for the more advanced NCT Challenge in March. Register for each exam separately.