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Turn your chemistry notes into multiple choice quiz questions

Upload a PDF, slide deck, or photo of a textbook page. DeckOwl writes multiple-choice, true/false, and short answer questions from your material, each with an explanation.

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How to practice chemistry with multiple choice quizzes

Before a unit test on stoichiometry or equilibrium, the most useful practice is answering questions in the same format the test uses. DeckOwl reads your own chemistry material and writes multiple-choice chemistry quizzes from it, with a short explanation for every answer so you can see why the right option works and the others do not.

Write quiz questions from your own lecture notes, not a generic chemistry bank.
Review explanations for wrong answers to find the concept that needs more work.
Mix question types so you practice recognition and recall, not just guessing.
Retry missed questions in a later session instead of rereading the whole chapter.

Example chemistry multiple choice questions

What is the molar mass of CO2 using C = 12.01 and O = 16.00 g/mol?44.01 g/mol. Add one carbon (12.01) to two oxygens (2 × 16.00 = 32.00).

In the equilibrium N2 + 3H2 ⇌ 2NH3, which change shifts the equilibrium to the right at constant volume?Adding more N2. Adding a reactant pushes the equilibrium toward the products.

True or false: an exothermic reaction has a positive enthalpy change.False. Exothermic reactions release heat, so ΔH is negative.

What is the pH of a 0.001 M HCl solution?3. HCl is a strong acid, so [H+] = 1 × 10^-3 M and pH = -log(1 × 10^-3) = 3.

Which quantum number describes the shape of an orbital?The azimuthal quantum number (l). It sets the subshell shape: s, p, d, or f.

Generate the full set

Questions from your own material

Every question is built from the chapters, slides, or notes you upload, so practice matches what your instructor actually covers.

Explanations for every answer

Each item explains why the correct option is right and why the distractors are wrong, so a missed question becomes a lesson.

Study in the browser or export

Take the quiz right away on the free plan. Paid plans export to PDF, DOCX, and Anki, and Pro adds QTI 2.1 and Moodle XML.

How it works

Upload your chemistry notes

Add a PDF, DOCX, PPTX, plain text file, or a photo of a page. Photos are read with text recognition.

Choose the question types

Pick multiple choice, true/false, short answer, or a mix, then generate the set.

Answer, check, and retry

Work through the questions, read each explanation, and redo the items you missed until the reasoning holds up.

You can start from almost any source: a lecture PDF, a DOCX handout, a slide deck, typed notes, or a photo of a textbook page. The tool generates multiple-choice, true/false, or short answer questions, so you can match the format of your exam or mix formats to test recall in different ways.

The free plan gives you 3 generations per month and lets you study in the browser. Plus and Pro add exports, and Pro adds QTI 2.1 and Moodle XML for instructors who run quizzes in a learning management system.

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Frequently asked questions

How many multiple choice questions should I practice before a chemistry exam?

There is no fixed number, but working through a full set at least twice is a practical target. Focus on the questions you missed, and keep going until you can explain why each wrong option is wrong.

Are the wrong answers in a chemistry quiz worth reviewing?

Yes. Reading the explanation for a missed item shows which idea needs work, such as limiting reagents or Le Chatelier's principle. Reviewing those ideas tends to pay off more than rereading the whole chapter.

Can I export my chemistry quiz?

PDF and DOCX exports are included in Plus at $39 per year or $7.99 per month. Pro at $14.99 per month adds QTI 2.1 and Moodle XML export.

Is there a free plan?

Yes. The free plan includes 3 generations per month and studying in the browser. No credit card is needed to start, and students with a school email get 40% off a paid plan.

Generate free quizzes

Keep exploring the topic

Review the main ideas visually or practice recalling them.