Unlimited Chemistry Practice Problems

Every chemistry professor tells their students to do more practice problems, but often, there aren't enough of them to do in the textbook. Here, you can finally hone your skills with unlimited problem banks and unique literature-based reaction examples.

Organic Chemistry General Chemistry Literature Reactions

Organic Chemistry Practice

Interactive practice tools with instant feedback on key topics to help you master organic chemistry.

Functional Groups and Nomenclature 6

Resonance 3

Acids and Bases 3

Arrow Drawing 1

  • Mechanism Arrows Learn to draw curved arrows for common organic mechanism steps.

Stereochemistry 6

Fischer Projections 3

Conformations 5

Boiling & Melting Points 4

  • Which Boils Higher? Two structures, measured boiling points: pick the higher, then name the deciding force.
  • Which Melts Higher? Compare measured melting points, where crystal packing matters as much as attraction.
  • Boiling Point Trends Drag three structures into boiling-point order: each set varies exactly one feature — chain length, branching, halogen size, O–H count, or force class.
  • Boiling vs Melting Inversions Pairs where the two properties disagree: one compound boils higher, the other melts higher.

NMR Spectroscopy: Concepts 6

  • Count ¹H NMR Signals Predict how many distinct signals a compound shows in its ¹H NMR spectrum, with color-coded equivalent-proton answer keys.
  • Count ¹³C NMR Signals Predict the number of distinct ¹³C NMR signals, with color-coded equivalent-carbon answer keys.
  • Find Equivalent Protons Click every position that is chemically equivalent to a highlighted atom and learn homotopic, enantiotopic, and diastereotopic relationships.
  • Predict Splitting Patterns Apply the n+1 rule to predict multiplicity, from singlets to septets, with worked explanations.
  • Predict Complex Splitting (dd, dt) Name compound multiplets where the J values genuinely differ, with splitting-tree answer keys.
  • Match the Molecule to the Integration Given a ¹H NMR integration ratio, pick which of three candidate structures fits its proton partition.

NMR Spectroscopy: Reading Spectra 4

  • Assign ¹H NMR Spectra Match every signal in a spectrum reconstructed from published experimental data to the protons that produce it, with zoomable multiplets.
  • Assign ¹³C NMR Spectra Match each line in a proton-decoupled ¹³C spectrum to its carbon; crowded regions are shown but honestly left unasked.
  • NMR Integration: Match the Spectrum Three candidate structures all share the same ¹H NMR integration ratio — read the chemical shifts and splitting on the spectrum to pick the one that fits.
  • DEPT Practice: Classify Every Carbon Read ¹³C, DEPT-90, and DEPT-135 spectra together and classify each carbon as CH₃, CH₂, CH, or quaternary.

Mass Spectrometry 4

  • Nitrogen Rule Read the nominal mass of M⁺• and call the strongest claim it supports about the nitrogen count.
  • Degrees of Unsaturation Turn a molecular formula into its ring + π-bond count, then find every degree on the revealed structure.
  • Isotope Patterns Read the M+2 cluster to identify Cl/Br content, or count carbons from the M+1 peak.
  • Exact Mass (HRMS) Real published HRMS values, two directions: identify the adduct from a known formula, or pin the formula down to millidaltons.

IR Spectroscopy 4

  • Assign the Band One band highlighted on a real IR spectrum — name the stretch it belongs to.
  • Spot the Group Structure hidden, spectrum shown: call the functional group the bands demand.
  • Predict the Bands From the structure, call which bands the real spectrum shows — and which tempting bands stay silent.
  • Match the Structure One real spectrum, four structures: eliminate the three the band data rules out.

General Chemistry Practice

Build intuition for core general chemistry concepts with interactive practice problems and instant feedback.

Atoms & Measurement 4

Bonding & Structure 2

Periodic Trends & Reactions 5

Naming & Formulas 2

  • Naming Compounds Name ionic, covalent, and acid compounds from their formulas.
  • Polyatomic Ions Memorize polyatomic ion names and formulas with flashcard-style practice.

Stoichiometry & Solutions 4

Acids, Bases & Thermo 3

Literature Reactions

Tired of too-simple and made-up organic reactions that look nothing like actual exam problems? Here are real reactions from the scientific literature, drawn as complete schemes: starting materials, conditions, and products, with the yield and reference where the source reports them. Sort them by mechanism, as our worksheets do, or by functional group, as most textbooks do. Use them to practice predicting the product or to hone your mechanism drawing skills.

Substitution & Elimination Reactions

Aliphatic nucleophilic substitution 13

Substitution & Elimination Reactions

Elimination 9

Addition to Alkenes & Alkynes

Addition to alkenes and alkynes 12

Pericyclic Reactions

Electrocyclic reactions 2

Pericyclic Reactions

Sigmatropic rearrangements 3

Radical Reactions

Radical reactions 5

Aromatic Chemistry

Electrophilic aromatic substitution 9

Aromatic Chemistry

Nucleophilic aromatic substitution 1

Aromatic Chemistry

Diazonium chemistry 4

Carbonyl Chemistry

Nucleophilic acyl substitution 14

Carbonyl Chemistry

Olefination 2

Enol & Enolate Chemistry

Enolate alkylation 2

Enol & Enolate Chemistry

Aldol and related condensations 6

Enol & Enolate Chemistry

Conjugate addition, annulation, cascades 4

Redox, Rearrangements & Organometallics

Oxidations and reductions 13

Redox, Rearrangements & Organometallics

Rearrangements 5

Redox, Rearrangements & Organometallics

Organometallic reagents and cross-coupling 5

Teaching with RealOChem? Every topic link above is a permanent URL, so you can assign a page directly in your LMS and it will still work next semester. All content is free for classroom use under CC BY-NC 4.0.

Study Guides

Study Guides New

Concise, professor-written guides that pair with the practice above — read the concept, see live examples from our problem bank, then go practice.

More On The Way

Reactions

Interactive practice for product prediction under development.