Where can I find AP Chemistry practice questions?

Start with the sample prompt types on this page, then move into the official AP Chemistry past-exams page for the strongest calibration.

Are AP Chem sample questions enough to study from?

They are useful for pattern recognition, but you should follow them with real timed practice and official prompts.

What should I do after reviewing AP Chem examples?

Pick one question type or weak skill and do a short timed set immediately so the example turns into active practice.

AP Chemistry

AP Chemistry Practice Questions, Examples, and FRQ Samples

10 MCQs and 3 FRQs on the topics that show up most. Answers and explanations included.

days until your AP Chem exam

Tue, May 5 · Morning session

Pick an answer to reveal the explanation.

Question 1 of 10 · Unit 1: Atomic Structure

Easy

Which element has the highest first ionization energy?

Question 2 of 10 · Unit 2: Molecular Structure

Medium

Which substance has the highest boiling point at standard pressure?

Question 3 of 10 · Unit 3: Intermolecular Forces

Medium

A sealed rigid container holds 2.0 mol of an ideal gas at 300 K and 1.0 atm. If 2.0 mol more of the same gas are added at constant temperature, what is the new pressure?

Question 4 of 10 · Unit 4: Chemical Reactions

Medium

How many grams of H₂O are produced when 16.0 g of CH₄ completely combusts? CH₄ + 2O₂ → CO₂ + 2H₂O (molar masses: CH₄ = 16, H₂O = 18).

Question 5 of 10 · Unit 5: Kinetics

Hard

Experimental data for A + B → C: doubling [A] doubles the rate; doubling [B] quadruples the rate.

What is the rate law?

Question 6 of 10 · Unit 6: Thermodynamics

Medium

For an exothermic reaction at constant pressure, which statement is true?

Question 7 of 10 · Unit 7: Equilibrium

Medium

For N₂(g) + 3H₂(g) ⇌ 2NH₃(g) + heat, at equilibrium.

Which change will shift the equilibrium toward more NH₃?

Question 8 of 10 · Unit 8: Acids and Bases

Medium

What is the pH of a 0.010 M HCl solution?

Question 9 of 10 · Unit 9: Free Energy

Hard

A reaction has ΔH > 0 and ΔS > 0. Under what conditions is it spontaneous?

Question 10 of 10 · Scientific practices

Medium

A student performs a titration of 25.0 mL of an unknown monoprotic acid with 0.100 M NaOH. The equivalence point is reached at 20.0 mL of base added.

What is the concentration of the acid?

4 moves that pick up easy AP Chem points

Small writing habits that turn a partial-credit FRQ into a full-credit one. Apply them as you work through the questions above.

1
Explain the particle-level, not just the label
Saying 'dipole-dipole forces are stronger' earns no points. Saying 'the O–H bond's partial charges create attractions strong enough to require more kinetic energy (higher T) to separate molecules' earns the explanation point.
2
Always write the equilibrium expression first
Kc or Kp questions reward writing the expression cleanly before plugging numbers. Skipping this step is a lost point even when your arithmetic is right.
Kc = [NH₃]²/([N₂][H₂]³), then substitute.
3
Track units through every conversion
mL to L, g to mol, kJ vs J - unit mismatches produce answers that are off by a factor of 1000. Write each unit next to each number as you go.
4
Cite the evidence from the graph or data
For lab-based FRQs, reference the actual numbers or the graph feature (equivalence point, slope, plateau) before making the chemical claim. 'The pH is 4.7 at the half-equivalence point' earns the point - 'the Ka is small' does not.

AP Chem practice - common questions

Write your response to any FRQ on this page and we'll score it against the College Board rubric in seconds. You get a breakdown of which points you earned, which you missed, and exactly what to add to pick them up.

Yes. Every MCQ and FRQ on this page is built around the task shapes the College Board keeps returning to. If a topic isn't on the exam, it isn't on this page.

Guessing wastes study time. The fastest shortcut is to hand us one FRQ - we flag the units and skills it reveals as weak (e.g. equilibrium, acid-base, or particle-level reasoning) so your next study block targets the gap instead of covering everything equally.

The past-exams page collects the released free-response sets. Pair them with the questions on this page for a full calibration: released prompts show you the exact difficulty, these show you the recurring patterns.

Open official AP Chem FRQs

Most colleges accept a 4 or 5. Some accept a 3. Composite thresholds move year to year, but roughly: 42+ for a 3, and about 72+ for a 5. Use the calculator to see where your current practice puts you.

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Score the 5. Keep the credit.

Write one AP Chem FRQ. Get it graded in seconds. Know exactly which points you'd lose before exam day.

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