Free AP practice studio · 37 courses · 3,700+ questions

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AP Chemistry

Instant explanations, a review queue that remembers what you miss, streaks, and a daily challenge. No account required — open a course and start answering.

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+Exam-style MCQsWritten to the CED

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What's inside

Built for repetition, not cramming.

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AP Chemistry4 to review

AP US History2 to review

AP Calculus BC6 to review

Review queue that remembers

Every miss collects by course until the idea actually sticks. Run a review-only session anytime.

Today's challengeAP Psychology · 25 Qs

Daily challenge

One shared course per calendar day, so everyone runs the same 25-question set.

Stats and streaks

Accuracy, best score per course, achievements, and a day counter that rewards showing up.

The orbit

Courses arranged as a universe of subject clusters. Zoom into a cluster, pick a course, start.

Unit 1 · Foundations

Unit 2 · Core ideas

Checkpoint

Lessons with checkpoints

Guided reading paths per course with inline checks before you jump into full practice sets.

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Progress saves in your browser. Open a course and start answering — no email, no paywall.

Workflow

How a session works

Four steps from landing page to measurable progress. Most students finish a standard set in under fifteen minutes.

Choose your AP

Start at the Courses hub: click a cluster in the orbit to see its AP subjects, or switch to grid view and search by name.

37 courses7 clustersOrbit or grid

Configure a session

Pick Quick (10), Standard (25), or Marathon (50 with a timer). Toggle shuffle for variety or review mode for misses only.

Quick · 10Standard · 25Marathon · 50

Answer & learn

Select A–D (or press keys 1–4), check your answer, and read the explanation. Timed mode adds a 60-second pulse per question.

Keys 1–4Enter to check→ next

Improve over time

Finish to update stats, unlock achievements, and queue missed items. Come back tomorrow for the daily challenge and keep your streak alive.

StreaksAchievementsReview queue

Inside a session

Answer, check, understand, repeat.

AP Chemistry7 / 10

A reaction has reached dynamic equilibrium. Which statement is true?

AThe rate of the forward reaction equals the rate of the reverse reaction.

BAll reactant molecules have been converted into product molecules.

CThe concentrations of reactants and products become equal.

DThe reaction stops and no molecular collisions occur.

Explanation

At equilibrium both reactions keep running at equal rates, so concentrations hold steady rather than becoming equal or falling to zero.

Try the button — it's the real one.

Keyboard-first

Select an option1234
Check answer / nextEnter
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Timed marathon

Marathon mode runs 50 questions with a 60-second pulse per question — the progress bar turns amber as the clock runs down.

00:59 · 00:58 · 00:57 · keep going

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Practice

Courses

Browse all 37 AP subjects and jump straight into exam-style practice.

Lessons

Learn

Interactive lesson paths with checkpoints before you practice.

Queue

Review

Everything you've missed, grouped by course, ready to re-run.

Progress

Stats

Accuracy, streaks, achievements, and your best score per course.

Ready when you are

Pick a course. Answer ten questions. See what sticks.

Free for every AP course. Your progress stays in your browser, and the review queue is waiting for whatever you miss.

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