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Functional Group Quiz: Identify common organic groups by structure

Quick, visual functional groups quiz with instant feedback and explanations.

Editorial: Review CompletedCreated By: Contradition EnsembleUpdated Aug 24, 2025
Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art illustration for organic chemistry quiz on functional groups on a teal background

This quiz helps you quickly identify common functional groups by structure and name. Get instant feedback, clear answers, and tips to build speed. For more practice, try the functional group identification test, the organic nomenclature quiz, and the ir spectroscopy quiz.

Ethanol contains an aldehyde functional group.
False
True
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Acetone is an example of a ketone.
False
True
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Which functional group is present in CH3CONH2?
Ester
Amine
Ether
Amide
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Which functional group is primarily responsible for the acidity of acetic acid?
Carbonyl (ketone)
Ether
Carboxyl
Hydroxyl (alcohol)
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Benzene is an alkene.
False
True
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The IR absorption of a simple, unconjugated carbonyl group typically appears near which wavenumber?
~2250 cm^-1
~900 cm^-1
~3300 cm^-1 (broad)
~1700 cm^-1
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A primary alcohol is oxidized to a ketone using PCC.
True
False
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Keto-enol tautomerism interconverts a carbonyl compound with a double bond adjacent to an -OH group.
False, only amines undergo this
True, via enol formation adjacent to the carbonyl
False, it requires a halogen substituent
False, it interconverts alcohols and ethers
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Acid anhydrides are formed by the dehydration of two carboxylic acids.
False
True
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What product is formed when a primary amine reacts with an aldehyde under mildly acidic, dehydrating conditions?
Enamine
Oxime
Acetal
Imine (Schiff base)
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In 1H NMR, the aldehydic proton typically resonates at which chemical shift (δ)?
~9-10 ppm
~0.5-1.5 ppm
~3-4 ppm
~6-7 ppm
undefined
Acetals are readily hydrolyzed under basic conditions.
True
False
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A lactone is best described as which of the following?
A cyclic anhydride
A cyclic amide
A cyclic ether
A cyclic ester
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Dehydration of a tertiary alcohol with strong acid typically proceeds by which mechanism to give an alkene?
Radical substitution
SN2
E1
E2
undefined
Which functional group has the highest priority in IUPAC naming?
Aldehyde
Carboxylic acid
Alcohol
Ketone
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Organocuprates (Gilman reagents) react with acid chlorides to give tertiary alcohols after aqueous workup.
False
True
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The Wittig reaction converts an aldehyde or ketone into which functional group connectivity?
An alcohol
An ether
An alkene at the carbonyl carbon
A carboxylic acid
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Baeyer-Villiger oxidation of a ketone inserts an oxygen adjacent to the carbonyl; which group generally migrates most readily?
Tertiary alkyl > secondary alkyl > primary alkyl > methyl
Primary alkyl > tertiary alkyl > secondary alkyl > methyl
Migration aptitude is random
Methyl > primary alkyl > secondary alkyl > tertiary alkyl
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Which transformation proceeds via an acyl azide rearrangement to an isocyanate intermediate, often yielding amines after hydrolysis?
Curtius rearrangement
Beckmann rearrangement
Pinacol rearrangement
Wolff rearrangement
undefined
Conjugation with a C=C lowers the C=O stretching frequency in IR compared to a nonconjugated carbonyl.
True
False
undefined
0

Study Outcomes

  1. Identify Functional Groups -

    Use the functional groups quiz to recognize the structure and defining features of key organic groups such as alcohols, amines, and carboxylic acids.

  2. Analyze Molecular Structures -

    Examine chemical formulas and diagrams to pinpoint functional groups within complex molecules and understand their roles in reactivity.

  3. Differentiate Structural Isomers -

    Distinguish between constitutional isomers by comparing how identical atoms connect to form different functional group arrangements.

  4. Classify Organic Compounds -

    Categorize hydrocarbons and functionalized molecules based on their functional groups, enhancing your ability to name and predict properties.

  5. Apply Quiz Feedback -

    Leverage instant quiz responses to correct misunderstandings and reinforce accurate identification of organic functional groups.

  6. Track Learning Progress -

    Monitor your score improvements over time to build confidence and guide further study in organic chemistry.

Cheat Sheet

  1. Core Functional Group Families -

    Review key organic chemistry functional groups - alcohols, carboxylic acids, amines, and esters - by focusing on their defining bonds (e.g., C - O, C=O, N - H). Structures from MIT OpenCourseWare show that classifying by family helps in any functional groups quiz for quick identification. Visualize each group's general formula (R - OH, R - COOH) to cement recognition.

  2. Structural vs. Stereoisomers -

    Distinguish structural isomers (same formula, different connectivity) from stereoisomers (same connectivity, different spatial arrangement) as outlined by the University of California, Berkeley Chemistry Department. Drawing both Fischer and Newman projections can clarify chiral centers and E/Z configurations. Practice by sketching C₄H₝₀O isomers to master this concept for your functional group quiz.

  3. Reactivity Trends & Polarity -

    Understand how electronegativity differences set the stage for reactivity: alcohols are more polar than ethers, and carboxylic acids are stronger acids than phenols. According to IUPAC guidelines, ranking functional groups by acidity (pKa) or nucleophilicity helps predict reaction pathways. Use simple reaction arrows (nucleophile attacks C=O) to test your knowledge in every organic chem functional groups quiz.

  4. IUPAC Nomenclature Essentials -

    Master the rules for naming organic functional groups - identify the parent chain, prioritize highest-order groups (carboxylic acids > aldehydes > alcohols), and apply proper suffixes. The Royal Society of Chemistry resources recommend numbering chains to give substituents the lowest possible locants. Regularly write names for compounds like 3-methylbutan-1-ol to build speed for the functional group quiz.

  5. Mnemonics & Memory Tricks -

    Boost retention with catchy phrases: "OH my alcohols, CO my acids!" helps recall - OH vs - COOH groups, while "Am I in amine?" flags the - NH₂ moiety. The University of Oxford's chemistry outreach suggests color-coding flashcards by group polarity for visual reinforcement. Incorporate these mnemonics before your next organic functional groups quiz to boost confidence and recall.

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