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UCLA Chem 20B Past Exams & Practice Tests

108 past exams for UCLA Chemistry and Biochemistry 20B (Chem 20B): 75 midterms, 33 finals, covering Winter 2022 through Fall 2026.

These are real Chem 20B midterms and finals shared by UCLA students, organized by professor and quarter — the fastest way to practice for your next Chem 20B exam. Professors covered: Barr, Dr. Eric Wu, Eric, Reslan, Weiss, Wilson, Wu.

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Available Chem 20B exams

ExamQuarterProfessor
Midterm 2Fall 2026Wu
Final (25 versions)Winter 2026Wu
Midterm 1Winter 2026Dr. Eric Wu
Midterm 1 (25 versions)Winter 2026Wu
Midterm 2 (24 versions)Winter 2026Wu
FinalSpring 2025Weiss
Final (5 versions)Winter 2025Wu
Midterm (2 versions)Winter 2025Wu
Midterm 1Winter 2025Eric
Midterm 1 (7 versions)Winter 2025Wu
Midterm 2Winter 2025Eric
Midterm 2 (8 versions)Winter 2025Wu
MidtermSpring 2024Reslan
FinalWinter 2024Reslan
FinalWinter 2024Wilson
Midterm 2Winter 2024Wu
MidtermSpring 2023Barr
Midterm 1Winter 2022Barr
Midterm 2Winter 2022Barr

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