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Functional Groups Quiz
Test your A-Level Chemistry knowledge with this Functional Groups Quiz! Identify functional groups, name compounds, and strengthen your organic chemistry skills. Includes answers & explanations! For a quick review of the topic, check out our revision notes: Functional Groups notes
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1. Which of the following functional groups is present in propanoic acid?
Answer: B) -COOHExplanation: Propanoic acid (CH₃CH₂COOH) contains the carboxyl (-COOH) functional group, characteristic of carboxylic acids.
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2.
What is the suffix used for naming an aldehyde?
Answer: C) -alExplanation: Aldehydes have the -CHO functional group and are named with the -al suffix (e.g., ethanal, CH₃CHO).
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3. Which of the following compounds is an ester?
Answer: C) CH₃COOCH₃Explanation: Esters have the -COO- functional group, and CH₃COOCH₃ is methyl ethanoate, a typical ester.
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4. Which functional group is found in ethanal?
Answer: B) -CHOExplanation: Ethanal (CH₃CHO) contains the aldehyde (-CHO) functional group.
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5. Which of the following compounds contains a ketone functional group?
Answer: A) CH₃COCH₃Explanation: Ketones contain a C=O group within a carbon chain. CH₃COCH₃ (propanone) is a ketone.
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6. Which of the following functional groups is characteristic of amines?
Answer: B) -NH₂Explanation: Amines contain the -NH₂ functional group (e.g., ethylamine, CH₃CH₂NH₂).
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7. Which of the following compounds contains an amide functional group?
Answer: A) CH₃CONH₂Explanation: Amides contain the -CONH₂ functional group, and CH₃CONH₂ is ethanamide.
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8. What is the functional group present in an ether?
Answer: B) -O-Explanation: Ethers have an oxygen (-O-) atom bonded between two carbon groups (e.g., CH₃OCH₃, dimethyl ether).
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9. What is the general formula for a carboxylic acid?
Answer: C) R-COOHExplanation: Carboxylic acids have the -COOH functional group, which defines their chemical properties.
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10. Which of the following functional groups is present in propyne?
Answer: C) C≡CExplanation: Alkynes contain a triple bond (C≡C), and propyne (CH₃C≡CH) is a typical alkyne.
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11. What is the correct IUPAC name of CH₃COCH₂CH₃?
Answer: B) ButanoneExplanation: The ketone functional group (-CO-) is present, so the suffix -one is used.
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12. Which functional group is responsible for the sweet smell of esters?
Answer: C) -COO-Explanation: Esters (-COO-) are known for their fruity and sweet aromas.
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13. Which of the following contains an alkene functional group?
Answer: B) Hâ‚‚C=CHâ‚‚Explanation: Alkenes contain a C=C bond, and ethene (Hâ‚‚C=CHâ‚‚) is the simplest alkene.
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14. Which functional group is found in ethanamide?
Answer: B) -CONH₂Explanation: Amides contain the -CONH₂ functional group (e.g., CH₃CONH₂, ethanamide).
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15. Which compound contains both a carbonyl (-CO-) and an alcohol (-OH) functional group?
Answer: B) CH₃COOHExplanation: Carboxylic acids (-COOH) contain both a carbonyl (-CO-) and a hydroxyl (-OH) group.
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