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AP Chemistry Practice Test

Build AP Chemistry readiness with original atomic structure, reactions, kinetics, equilibrium, acids, electrochemistry, and lab reasoning questions.

AP Chemistry practice sets

This page provides one canonical AP Chemistry practice hub with five short sets of 10 original questions each. The sets cover atomic structure, bonding, properties of substances and mixtures, reactions, stoichiometry, kinetics, thermochemistry, equilibrium, acids and bases, thermodynamics, electrochemistry, experimental design, and data analysis.

Skills covered

  • Models and representations — particulate, symbolic, mathematical, and macroscopic descriptions
  • Questions and methods — variables, controls, procedures, measurements, and error analysis
  • Representing data and phenomena — equations, graphs, models, and chemical evidence
  • Mathematical routines — moles, stoichiometry, rates, equilibrium, pH, energy, and electrochemistry
  • Argumentation — claims supported by chemical evidence and reasoning

AP Chemistry course and exam scope

College Board organizes AP Chemistry into nine units: Atomic Structure and Properties; Compound Structure and Properties; Properties of Substances and Mixtures; Chemical Reactions; Kinetics; Thermochemistry; Equilibrium; Acids and Bases; and Thermodynamics and Electrochemistry.

College Board’s current exam page describes a hybrid digital exam with multiple-choice questions in Bluebook and handwritten free-response answers in paper booklets. Calculators are permitted under current policy, and reference materials are provided; device rules, timing, and exam details can change, so check the current official materials before test day.

How to use this page

Start with one untimed set to identify a topic gap, then use timed sets to build pacing. For every missed item, check the chemical representation, units, conditions, and evidence before solving a new similar problem.

These questions are original supplemental practice. They are not official College Board questions, secure AP Exam content, AP Classroom assignments, a score predictor, or a substitute for current AP policies and course materials.

For current scope and preparation, review the AP Chemistry course page, the AP Central course overview, the AP Chemistry exam page, the AP Chemistry Course and Exam Description, and the AP calculator policy.

For more study options, visit AP Exam Tests or explore AP Biology Practice, AP Calculus AB & BC Practice, High School Course Tests, and Pomodoro.

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5 Tests
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1. Test

AP Chemistry Practice Questions

A 10-question AP Chemistry practice set on ap chemistry: atomic structure, bonding, and properties, with answers and explanations.

Read the chemical model, equation, data, or experimental scenario carefully. Choose the best answer and review the explanation after each response.

10 Questions
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1. QuestionMultiple choice

What does the atomic number represent?

Please select an answer first.

Correct answer: A

The correct answer is The number of protons.

  1. Identify the chemistry idea: Determine whether the AP Chemistry practice prompt asks about particles, representations, equations, energy, rate, equilibrium, or an experimental method.
  2. Apply the method: Atomic number is defined by the number of protons in the nucleus.
  3. Check units and evidence: Verify the chemical equation, units, signs, conditions, and connection between the model and the observed phenomenon.

Atomic number is defined by the number of protons in the nucleus.

2. QuestionMultiple choice

Isotopes of an element have the same number of protons but different numbers of what?

Please select an answer first.

Correct answer: B

The correct answer is Neutrons.

  1. Identify the chemistry idea: Determine whether the AP Chemistry practice prompt asks about particles, representations, equations, energy, rate, equilibrium, or an experimental method.
  2. Apply the method: Different neutron counts produce isotopes of the same element.
  3. Check units and evidence: Verify the chemical equation, units, signs, conditions, and connection between the model and the observed phenomenon.

Different neutron counts produce isotopes of the same element.

3. QuestionMultiple choice

What does a Lewis diagram show?

Please select an answer first.

Correct answer: C

The correct answer is Valence electrons and bonding arrangements.

  1. Identify the chemistry idea: Determine whether the AP Chemistry practice prompt asks about particles, representations, equations, energy, rate, equilibrium, or an experimental method.
  2. Apply the method: Lewis diagrams represent valence electrons and shared or unshared pairs.
  3. Check units and evidence: Verify the chemical equation, units, signs, conditions, and connection between the model and the observed phenomenon.

Lewis diagrams represent valence electrons and shared or unshared pairs.

4. QuestionMultiple choice

What type of bond forms when atoms share electron pairs?

Please select an answer first.

Correct answer: D

The correct answer is Covalent.

  1. Identify the chemistry idea: Determine whether the AP Chemistry practice prompt asks about particles, representations, equations, energy, rate, equilibrium, or an experimental method.
  2. Apply the method: Covalent bonding involves sharing electrons between atoms.
  3. Check units and evidence: Verify the chemical equation, units, signs, conditions, and connection between the model and the observed phenomenon.

Covalent bonding involves sharing electrons between atoms.

5. QuestionMultiple choice

What does a cation have relative to its neutral atom?

Please select an answer first.

Correct answer: A

The correct answer is Fewer electrons and a positive charge.

  1. Identify the chemistry idea: Determine whether the AP Chemistry practice prompt asks about particles, representations, equations, energy, rate, equilibrium, or an experimental method.
  2. Apply the method: Loss of electrons produces a positively charged cation.
  3. Check units and evidence: Verify the chemical equation, units, signs, conditions, and connection between the model and the observed phenomenon.

Loss of electrons produces a positively charged cation.

6. QuestionMultiple choice

Which property is generally associated with a polar molecule?

Please select an answer first.

Correct answer: B

The correct answer is An uneven distribution of charge.

  1. Identify the chemistry idea: Determine whether the AP Chemistry practice prompt asks about particles, representations, equations, energy, rate, equilibrium, or an experimental method.
  2. Apply the method: Molecular geometry and bond polarity can produce an overall dipole.
  3. Check units and evidence: Verify the chemical equation, units, signs, conditions, and connection between the model and the observed phenomenon.

Molecular geometry and bond polarity can produce an overall dipole.

7. QuestionMultiple choice

What does VSEPR theory use to predict?

Please select an answer first.

Correct answer: C

The correct answer is Molecular shape from repulsion among electron groups.

  1. Identify the chemistry idea: Determine whether the AP Chemistry practice prompt asks about particles, representations, equations, energy, rate, equilibrium, or an experimental method.
  2. Apply the method: Electron groups repel and arrange to minimize repulsion.
  3. Check units and evidence: Verify the chemical equation, units, signs, conditions, and connection between the model and the observed phenomenon.

Electron groups repel and arrange to minimize repulsion.

8. QuestionMultiple choice

Which intermolecular force is present in all molecular substances?

Please select an answer first.

Correct answer: D

The correct answer is London dispersion forces.

  1. Identify the chemistry idea: Determine whether the AP Chemistry practice prompt asks about particles, representations, equations, energy, rate, equilibrium, or an experimental method.
  2. Apply the method: Temporary electron distributions create London dispersion forces in all particles.
  3. Check units and evidence: Verify the chemical equation, units, signs, conditions, and connection between the model and the observed phenomenon.

Temporary electron distributions create London dispersion forces in all particles.

9. QuestionMultiple choice

What happens to the average kinetic energy of gas particles when temperature rises?

Please select an answer first.

Correct answer: A

The correct answer is It increases.

  1. Identify the chemistry idea: Determine whether the AP Chemistry practice prompt asks about particles, representations, equations, energy, rate, equilibrium, or an experimental method.
  2. Apply the method: Temperature is proportional to average kinetic energy in the particle model.
  3. Check units and evidence: Verify the chemical equation, units, signs, conditions, and connection between the model and the observed phenomenon.

Temperature is proportional to average kinetic energy in the particle model.

10. QuestionMultiple choice

Why can a mass spectrum help identify isotopes?

Please select an answer first.

Correct answer: B

The correct answer is It displays relative abundance and mass-to-charge information for ions.

  1. Identify the chemistry idea: Determine whether the AP Chemistry practice prompt asks about particles, representations, equations, energy, rate, equilibrium, or an experimental method.
  2. Apply the method: Isotopic peaks differ in mass and reveal relative abundance.
  3. Check units and evidence: Verify the chemical equation, units, signs, conditions, and connection between the model and the observed phenomenon.

Isotopic peaks differ in mass and reveal relative abundance.

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Frequently asked questions about AP Chemistry Practice Tests

What topics are included on this AP Chemistry practice page?

The page covers atomic structure, bonding, substances and mixtures, reactions, kinetics, thermochemistry, equilibrium, acids and bases, thermodynamics, electrochemistry, and lab reasoning.

Are these official College Board questions?

No. These are original supplemental questions. Use AP Classroom, Bluebook previews, AP Central, and current College Board course materials for official preparation.

Is the AP Chemistry exam digital?

College Board’s current exam page describes a hybrid digital exam, with multiple-choice questions in Bluebook and handwritten free-response answers in paper booklets.

Can I use a calculator on AP Chemistry?

Current College Board policy permits calculators for AP Chemistry, but students should check the latest approved-device and digital calculator information.

How should I answer a chemistry data question?

Identify the variables and trend, connect the evidence to a chemical model or equation, and state a conclusion with correct units and conditions.