AP Chemistry Practice Test and Study Guide 2021 (UPDATED):

AP Chemistry Practice Test and Study Guide 2021 (UPDATED): Download printable question answers in PDF. Prepare your College Board’s Advanced Placement® Program (AP®) with our free quiz practice test.

Advanced Placement examinations (AP exams) are exams offered in the United States by the College Board and are taken each May by students. The tests are the culmination of year-long Advanced Placement (AP) courses. AP exams (with few exceptions) have a multiple-choice section and a free-response section.

AP Chemistry Practice Test 2021

The sample exam questions that follow illustrate the relationship between the course framework and the AP Chemistry Exam and serve as examples of the types of questions that appear on the exam. After the sample questions is a table that shows which skill, learning objective(s), and unit each question relates to. The table also provides the answers to the multiple-choice questions.


AP Chemistry Exam Score

The AP Grades that are reported to students, high schools, colleges, and universities in July are on AP’s five-point scale:

AP Score Credit Recommendation College Grade Equivalent
5 Extremely well qualified A
4 Well qualified A−, B+, B
3 Qualified B−, C+, C
2 Possibly qualified N/A
1 No recommendation N/A

AP Chemistry Exam Content

The nine units in AP Chemistry, and their weighting on the multiple-choice section of the AP Exam, are listed below.

  • Unit 1: Atomic Structure and Properties 7–9%
  • Unit 2: Molecular and Ionic Compound Structure and Properties 7–9%
  • Unit 3: Intermolecular Forces and Properties 18–22%
  • Unit 4: Chemical Reactions 7–9%
  • Unit 5: Kinetics 7–9%
  • Unit 6: Thermodynamics 7–9%
  • Unit 7: Equilibrium 7–9%
  • Unit 8: Acids and Bases 11–15%
  • Unit 9: Applications of Thermodynamics 7–9%

The AP Chemistry Exam assesses student understanding of the science practices and learning objectives outlined in the course framework. The exam is 3 hours and 15 minutes long and includes 60 multiple-choice questions and 7 free-response questions. A scientific or graphing calculator is recommended for use in Section II of the exam. No calculators are permitted for use on Section I. Students are provided with the periodic table and a formula sheet that lists specific and relevant formulas for use on the exam.

Timing Number of Questions % of Exam Score
Section I 90 minutes 60 multiple-choice questions

*Use of a calculator is not allowed.

Section II 105 minutes 3 long-form free-response questions
4 short-form free-response questions*Use of a calculator is allowed.

Section I: Multiple-Choice

Science Practices 1, 2, 4, 5, and 6 are all assessed in the multiple-choice section with the following exam weighting (Science Practice 3 is not assessed in the multiple-choice section)

  • Practice 1: Models and Representations 8–12%
  • Practice 2: Question and Method 8–12%
  • Practice 4: Model Analysis 23–30%
  • Practice 5: Mathematical Routines 35–42%
  • Practice 6: Argumentation 8–12%

Section II: Free-Response

All six science practices are assessed in the free-response section with the following exam weighting:

  • Practice 1: Models and Representations 2–4%
  • Practice 2: Question and Method 10–16%
  • Practice 3: Representing Data and Phenomena 8–16%
  • Practice 4: Model Analysis 5–9%
  • Practice 5: Mathematical Routines 43–53%
  • Practice 6: Argumentation 15–24%

A group of college and high school Chemistry instructors known as the AP Development Committee creates the AP Chemistry exam. The committee’s job is to ensure that the annual AP Chemistry exam reflects what is taught in college-level Chemistry classes at high schools. This committee writes a large number of multiple-choice questions, which are pre-tested and evaluated for clarity, appropriateness, and range of possible answers.

The free-response essay questions that makeup Section II go through a similar process of creation, modification, pre-testing, and final refinement, so that the questions cover the necessary areas of material and are at an appropriate level of difficulty and clarity. The committee also makes a great effort to construct a free-response exam that will allow for clear and equitable grading by the AP readers. It is important to remember that the AP Chemistry exam undergoes a thorough evaluation after the yearly administration of the exam. This way, the College Board can use the results to make course suggestions and to plan future tests.

AP Chemistry Exam Study Guide

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Course and Exam Description 2020 Download
AP Chemistry Exam Study Guide Download
AP Chemistry Past Exam Questions 2014 to 2019 View All

Previous AP Chemistry Practice Test Question

Download the Past AP Chemistry Multiple Choice Questions Answers in printable PDF. Multiple-Choice Questions and Answer Key Free-Response Questions, Scoring Guidelines, and Sample Student Responses with Commentary Statistical Information about Student Performance on the respective years.


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1999 Multiple choice
1999 Practice Exams