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Get a chemistry quiz app that works from your own notes

Upload your lecture slides, PDFs or typed notes and get practice questions with explanations for every answer, so you know exactly what to review before the exam.

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Drop files here or browsePDF, DOCX, PPTX, text or photos of your notes · several files with Plus

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How a chemistry quiz app helps you prepare for exams

Chemistry rewards practice, since you need to remember formulas, reaction types and rules, and a chemistry quiz app tests you on the exact material in your course. Upload a PDF, a set of slides or typed notes and DeckOwl writes multiple-choice, true/false or short-answer questions with explanations for each answer. You can then find weak spots before an exam instead of after.

Multiple-choice, true/false and short-answer questions from your own notes
Explanations that show the reasoning behind each correct answer
Free plan with 3 generations per month and studying in the browser
Paid plans add exports for PDF, DOCX and Anki, and Pro adds QTI 2.1 and Moodle XML

Example general chemistry quiz questions with answers

What is the pH of a neutral solution at 25 °C?7. Pure water dissociates into equal amounts of H+ and OH- ions, so neither ion dominates.

True or false: adding a catalyst changes the equilibrium constant of a reaction.False. A catalyst speeds up the forward and reverse reactions equally, so the equilibrium constant stays the same.

How many valence electrons does an oxygen atom have?Six. Oxygen is in group 16, and for main-group elements the group number gives the valence electron count.

What is the molar mass of CO2 to one decimal place?44.0 g/mol. Carbon is about 12.0 and each oxygen about 16.0, which adds up to 44.0.

Which bond forms when atoms share electron pairs?A covalent bond. Shared pairs hold the atoms together, while ionic bonds transfer electrons from one atom to another.

Generate the full set

Multiple-choice, true/false and short answer

Choose the question format that fits the chapter, from quick true/false checks to open questions that test reasoning.

Explanations for every answer

Each question comes with a short explanation, so a wrong answer teaches you why the correct reaction, formula or rule applies.

Built from your own material

Questions come from the PDFs, slides, DOCX files or photos of pages you upload, so the quiz matches what your instructor covered.

How it works

Upload your chemistry material

Add a PDF, PPTX, DOCX, plain text file or a photo of a textbook page. Text recognition reads images too.

Choose the question type

Pick multiple-choice, true/false or short answer, then generate the quiz and review the questions.

Study and repeat weak topics

Answer the questions in your browser, read the explanations, and retake the topics you missed until they are solid.

Quizzes work best when they are spaced out and mixed. Retaking the same chemistry topics over several days helps more than one long cram session, and explanations show you the reasoning behind each answer, such as why a catalyst leaves an equilibrium constant unchanged. Start with the chapters you find hardest and keep the questions you miss for the next session.

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Frequently asked questions

How many practice questions should I do for a chemistry exam?

Most students get more from several short sessions of 15 to 20 questions than from one very long set. Focus extra questions on the topics you missed the first time.

How often should I review chemistry quiz questions?

Reviewing the same questions again after one day, then after a few days, helps memory stick better than a single pass. Re-read the explanation for any question you got wrong.

Does the quiz explain why an answer is wrong?

Yes, each question includes an explanation that covers why the correct answer is right. Explanations are included on the free plan as well.

Can I export my chemistry quiz?

Exporting to PDF and DOCX is available on the Plus plan at $39/year or $7.99/month. QTI 2.1 and Moodle XML export are part of the Pro plan at $14.99/month.

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Keep exploring the topic

Review the main ideas visually or practice recalling them.