Question 1

Which of the following statements correctly describes the carbonyl group found in aldehydes and ketones?

Accepted Answer

It consists of a carbon atom double-bonded to an oxygen atom.

Question 2

Which of the following is the correct IUPAC name for the compound with the structure $CH_3CH_2CH_2CHO$?

Accepted Answer

Butanal

Question 3

A patient is exposed to formaldehyde. Which functional group is present in formaldehyde?

Accepted Answer

Aldehyde

Question 4

Which of the following compounds can be oxidized by Tollens' reagent?

Accepted Answer

Benzaldehyde

Question 5

Which property is shared by both aldehydes and ketones due to the presence of the carbonyl group?

Accepted Answer

They are polar and can form hydrogen bonds with water.

Question 6

What is the product when an aldehyde is oxidized?

Accepted Answer

A carboxylic acid

Question 7

Which of the following is true regarding the reduction of ketones?

Accepted Answer

Ketones are reduced to secondary alcohols.

Question 8

A chemist adds an alcohol to an aldehyde. What is the initial product formed?

Accepted Answer

Hemiacetal

Question 9

Which of the following best describes a hemiacetal?

Accepted Answer

A compound with both an alcohol-like OH group and an ether-like OR group bonded to the same carbon.

Question 10

Which of the following statements is true about the boiling points of aldehydes and ketones?

Accepted Answer

They have lower boiling points than alcohols but higher than alkanes due to dipole-dipole interactions.

Question 11

Which of the following is the correct IUPAC name for the compound commonly known as acetone?

Accepted Answer

2-propanone

Question 12

A solution contains both an aldehyde and a ketone. Which reagent would you use to selectively oxidize the aldehyde?

Accepted Answer

Tollens' reagent

Question 13

Which of the following is NOT a product of the hydrolysis of an acetal?

Accepted Answer

Carboxylic acid

Question 14

Which of the following compounds is most likely to be used as a solvent for both polar and nonpolar solutes?

Accepted Answer

Acetone

Question 15

A student mixes ethanol with propanone. What type of compound is propanone?

Accepted Answer

A ketone

Question 16

Which of the following is the correct structure for benzaldehyde?

Accepted Answer

A benzene ring with a $-CHO$ group attached

Question 17

Which of the following reactions will NOT occur under normal conditions?

Accepted Answer

Oxidation of a ketone to a carboxylic acid

Question 18

A chemist wants to synthesize an acetal from an aldehyde. Which sequence of steps is required?

Accepted Answer

Add alcohol, then another alcohol

Question 19

Which of the following is the correct order for naming the R groups in a ketone according to IUPAC rules?

Accepted Answer

Smallest to largest R group

Question 20

A patient is found to have elevated levels of acetaldehyde in their blood. Which of the following is the correct IUPAC name for acetaldehyde?

Accepted Answer

Ethanal

Aldehydes and Ketones: Structure, Properties, and Reactions

Study Guide - Practice Questions