ACS Gen Chem Practice Test 2026 — Free ACS Gen Chem Exam Prep Questions
Many colleges give the ACS General Chemistry Exam as a standardized final at the end of the two-semester general chemistry sequence, and some use it for placement or credit. Our practice covers the full-year course, organized by the ACS Exams Institute's ten anchoring concepts: atomic structure, bonding, molecular shape, intermolecular forces, reactions and stoichiometry, gases, thermochemistry, kinetics, equilibrium and data handling.
A 1.00-L buffer contains 0.200 mol and 0.150 mol . What is the pH after 0.050 mol HCl is added? Assume no volume change. ( of )
ACS Gen Chem format, scoring & key facts
Paper exam booklet given by your instructor, usually as the final for a two-semester general chemistry course. Proctored by authorized staff for the whole session; phones and other image-capturing devices are not allowed. Two colored forms contain the same questions in a different order.
| Current exam | 2024 Full Year exam (GC24), not yet normed; the 2021 exam (GC21) is the newest with national norms |
|---|---|
| Length | 70 multiple-choice questions |
| Time | 110 minutes (112 minutes on the 2024 exam) |
| Scoring | Number correct, compared with national norms as a percentile rank |
| Content map | 10 anchoring concepts, from atoms and bonding to equilibrium and visualization |
| Related exams | First-term and second-term exams (70 questions), a 50-question brief exam (55 min), and conceptual exams |
| Official study guide | Preparing for Your ACS Examination in General Chemistry: 201 pages, 600+ problems, $30 |
| Official practice exams | 50-question online practice exams: $10 traditional, $15 tutorial |
Facts last verified Oct 17, 2026. Source: uwm.edu/acs-exams/instructors/assessment-materials/exams/. Always confirm details with ACS Division of Chemical Education Examinations Institute before your exam.
When can you take the ACS Gen Chem?
Your instructor schedules the exam, usually as the end-of-course final.
What the ACS Gen Chem covers
Every PrepBanq ACS Gen Chem test covers the official content areas; the test owner does not publish weights.
| Content domain | Our practice questions |
|---|---|
AtomsAtomic structure, isotopes, electron configuration, periodic trends, light and spectra, gases and kinetic molecular theory, the mole, nuclear reactions. | 18 questions → |
BondingIonic and covalent bonding, electronegativity, bond energy and order, valence bond and molecular orbital ideas, metallic bonding. | 12 questions → |
Structure and FunctionLewis structures, VSEPR shapes, hybridization, polarity, isomers, functional groups, solids and unit cells. | 12 questions → |
Intermolecular InteractionsIntermolecular forces, phase behavior and vapor pressure, solutions, concentration and colligative properties. | 14 questions → |
Chemical ReactionsBalancing, stoichiometry, limiting reactant and yield, precipitation, acid-base and redox reactions. | 20 questions → |
Energy and ThermodynamicsCalorimetry, enthalpy and Hess's law, entropy, Gibbs energy, electrochemical cells. | 20 questions → |
KineticsRate laws, integrated rate laws and half-life, activation energy, mechanisms, catalysis. | 14 questions → |
EquilibriumEquilibrium constants, Le Chatelier's principle, acids and bases, buffers, titrations, solubility. | 24 questions → |
Experiments, Measurement, and DataMeasurement, significant figures, error, calibration, separations, solution preparation, lab safety. | 8 questions → |
VisualizationConnecting particulate, symbolic and macroscopic views; reading energy profiles and linearized data. | 8 questions → |
How to register for the ACS Gen Chem
Retake policy
ACS Exams does not register students; you take the exam through your chemistry course.
Score release
Instructors can use the free ACS scoring service; score reports are generated within 24 hours of receipt.
Credential renewal
Scores are percentile ranks against national norms for the specific exam form.
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ACS Gen Chem FAQ
How many questions are on the ACS Gen Chem?
The ACS Gen Chem has 70 questions and you have 1 hour 50 minutes to finish. Question types: Multiple choice, one correct answer per question. Content is mapped to the ACS Anchoring Concepts Content Map for general chemistry and covers both semesters..
How long is the ACS Gen Chem exam?
Testing time for the ACS Gen Chem is 1 hour 50 minutes.
What is the passing score for the ACS Gen Chem?
ACS Gen Chem passing standard: No pass/fail: your number correct is compared with national norms as a percentile rank, and your instructor decides how it counts toward your grade. Score range: Raw score 0–70, reported as a national percentile rank.
How much does the ACS Gen Chem cost?
The ACS Gen Chem registration fee is Students do not register or pay ACS. Institutions buy exam booklets at $2.50 to $1.75 each in 2026 (minimum order 25). Check the official site for current fees before you register.
What is on the ACS Gen Chem?
The ACS Gen Chem covers Atoms, Bonding, Structure and Function, Intermolecular Interactions, Chemical Reactions, Energy and Thermodynamics, Kinetics, Equilibrium, Experiments, Measurement, and Data, Visualization.
Who administers the ACS Gen Chem?
The ACS General Chemistry Exam is administered by ACS Division of Chemical Education Examinations Institute. Delivery: Paper exam booklet given by your instructor, usually as the final for a two-semester general chemistry course. Proctored by authorized staff for the whole session; phones and other image-capturing devices are not allowed. Two colored forms contain the same questions in a different order.
Can you retake the ACS Gen Chem?
ACS Exams does not register students; you take the exam through your chemistry course.
Is there a free ACS Gen Chem practice test?
Yes. PrepBanq has 15 free ACS Gen Chem practice tests with 150 exam-style questions in the real ACS Gen Chem formats, and every answer is explained. No credit card is needed.
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