The Chemical Equilibrium Quiz is a free, unofficial web app for practicing high school chemistry in a 4-choice quiz format.
The questions are original and cover equilibrium constants, reaction quotient, Le Chatelier-style predictions, gas equilibrium, weak acid equilibrium, and solubility equilibrium.
This app uses general chemistry facts, formulas, units, and self-made numerical settings. It does not reproduce textbook text, textbook exercises, entrance exam questions, mock exam questions, or worksheet problems.
The quiz focuses on short decisions: how to write K, how Q compares with K, which direction the equilibrium shifts, and how temperature, pressure, concentration, and catalysts affect equilibrium.
The quiz is organized for searches and review needs such as equilibrium constant expression practice, Q versus K comparison, Le Chatelier concentration change questions, temperature shift questions, gas equilibrium pressure and volume questions, catalyst and equilibrium checks, weak acid Ka practice, solubility product Ksp practice, common ion effect review, and precipitation judgment.
Each question is short, but the hints show the reasoning path: write the expression, substitute values, compare Q and K, count gas coefficients, or decide which change offsets the stress.
This site is not an official site of any ministry, examination body, school, publisher, or prep school. The problems, choices, explanations, and diagrams are independently created.
Please refer to official sites for official curriculum, exam, and material information. If there is any rights-related concern, please contact us using the inquiry form linked in the Japanese notice.