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Understanding Aldehydes and Ketones

Chemistry

An overview of the chemical properties, nomenclature, preparation, and identification tests for aldehydes and ketones.

Organic Chemistry Functional Groups Chemical Analysis
19 Questions Medium Ages 16+ Jun 24, 2026
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This study set covers Chemistry through 19 practice questions. An overview of the chemical properties, nomenclature, preparation, and identification tests for aldehydes and ketones. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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Browse all 19 questions from the Understanding Aldehydes and Ketones study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What functional group is common to both aldehydes and ketones?
  • A Hydroxyl group
  • B Carbonyl group
  • C Carboxyl group
  • D Ether group
2 Where is the carbonyl group located in an aldehyde?
  • A In the middle of a chain
  • B At the end of a chain
  • C Attached to two other carbons
  • D Inside a ring
3 How are aldehydes primarily prepared in the laboratory?
  • A Reduction of ketones
  • B Oxidation of primary alcohols
  • C Hydration of alkenes
  • D Oxidation of tertiary alcohols
4 What suffix is used when naming aldehydes?
  • A -one
  • B -ol
  • C -al
  • D -oic acid
5 When naming aldehydes, why is it unnecessary to number the position of the functional group?
  • A It is always terminal
  • B It is always in the center
  • C The name would be too long
  • D It is always on carbon 2
6 What is the condensed structural formula for the aldehyde functional group?
  • A -OH
  • B -COOH
  • C -CHO
  • D -CO-
7 What is the result of adding acidified dichromate to an aldehyde?
  • A The mixture turns blue
  • B The mixture turns green
  • C The mixture stays orange
  • D The mixture turns black
8 Can ketones be oxidized by acidified dichromate?
  • A Yes, easily
  • B Yes, but slowly
  • C No
  • D Only in sunlight
9 What is observed when an aldehyde reacts with Tollens' reagent?
  • A A green solution
  • B A silver mirror
  • C Bubbles of gas
  • D A white precipitate
10 When naming an aldehyde with branches, where should you begin numbering the carbon chain?
  • A From the end nearest the branch
  • B From the functional group
  • C From the longest chain
  • D From the middle
11 What is the parent alkane name for propanal?
  • A Propane
  • B Propene
  • C Propanol
  • D Propanone
12 If a molecule has two aldehyde functional groups, what prefix is used?
  • A Bi-
  • B -di
  • C -bis
  • D -tri
13 What is the primary industrial use for ketones?
  • A Food flavoring
  • B Solvents
  • C Detergents
  • D Preservatives
14 What happens to the color of acidified dichromate when it reacts with an aldehyde?
  • A Orange to green
  • B Green to orange
  • C Clear to blue
  • D Yellow to red
15 Tollens' reagent is also known as what?
  • A Ammoniacal silver nitrate
  • B Sodium hydroxide
  • C Copper sulfate
  • D Potassium permanganate
16 Aldehydes and ketones are widely used in which of the following?
  • A Fragrances and flavors
  • B Concrete production
  • C Metal polishing
  • D Battery manufacturing
17 In the IUPAC naming of aldehydes, what is removed from the parent alkane name?
  • A -ane
  • B -e
  • C -an
  • D -al
18 Which of these is an example of an aldehyde?
  • A Propanone
  • B Butanal
  • C Pentane
  • D Hexanol
19 Why is the carbonyl group considered polar?
  • A Because of the oxygen atom
  • B Because of the carbon atom
  • C Because it contains hydrogen
  • D Because it is ionic
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