Aldehydes and Ketones Chemistry

Chemistry

An overview of the structure, nomenclature, preparation, and chemical properties of aldehydes and ketones, including oxidation tests.

Organic Chemistry Functional Groups Chemical Analysis

15 Questions Medium Ages 16+ Jun 24, 2026

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About this Study Set

This study set covers Chemistry through 15 practice questions. An overview of the structure, nomenclature, preparation, and chemical properties of aldehydes and ketones, including oxidation tests. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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1 What functional group do both aldehydes and ketones contain?

A Hydroxyl group
B Carbonyl group
C Carboxyl group
D Ester group

2 Where is the carbonyl group located in an aldehyde?

A At the end of a carbon chain
B In the middle of a carbon chain
C Attached to a nitrogen atom
D It is not part of a chain

3 How are aldehydes prepared?

A Reduction of ketones
B Oxidation of primary alcohols
C Reaction of alkanes
D Hydrolysis of esters

4 What is the suffix used when naming aldehydes?

A -one
B -ol
C -al
D -oic

5 In the IUPAC name for aldehydes, why is it not necessary to number the position of the functional group?

A It is always terminal
B It is always in the middle
C The chain is too short
D It is always on carbon 2

6 What is the condensed structural formula for the aldehyde group?

A -OH
B -CHO
C -COOH
D -CO-

7 If a molecule has two aldehyde functional groups, what prefix is used?

A bi-
B di-
C tri-
D poly-

8 When naming aldehydes with branches, from which end do you start numbering the carbon chain?

A The end closest to the branch
B The functional group
C The middle
D Alphabetical order

9 What is the common name for the parent alkane of propanal?

A Propane
B Propene
C Propanol
D Propanone

10 What is the primary use of ketones in industry?

A As food flavorings
B As solvents
C As synthetic fibers
D As preservatives for food

11 What happens to the color of acidified dichromate when it reacts with an aldehyde?

A Changes from green to orange
B Changes from orange to green
C Remains orange
D Remains green

12 Which reagent is used to distinguish between aldehydes and ketones by forming a silver mirror?

A Benedict's solution
B Tollens' reagent
C Bromine water
D Sodium hydroxide

13 Does propanone react with Tollens' reagent?

A Yes, it forms a mirror
B Yes, it turns green
C No, the mixture remains colourless
D No, it turns orange

14 What is the product of the oxidation of propanal?

A Propanone
B Propanoic acid
C Propane
D Propanol

15 Which of the following describes the polarity of the carbonyl functional group?

A Non-polar
B Polar
C Ionic
D Metallic

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