Question 1

Which of the following best describes the functional group present in both aldehydes and ketones?

Accepted Answer

A carbonyl group $\mathrm{(C=O)}$

Question 2

Which compound would give a positive result in Benedict’s Test?

Accepted Answer

Ethanal

Question 3

What is the IUPAC name for the compound with the condensed formula $\mathrm{CH_3CH_2CHO}$?

Accepted Answer

Propanal

Question 4

Which of the following statements about boiling points is correct?

Accepted Answer

Aldehydes and ketones have higher boiling points than alkanes but lower than alcohols of similar molecular weight.

Question 5

Which of the following is the correct product when butanone is reduced with $\mathrm{NaBH_4}$?

Accepted Answer

2-butanol

Question 6

A primary alcohol is oxidized. Which type of compound is formed?

Accepted Answer

Aldehyde

Question 7

Which of the following is NOT a catalyst used in the reduction of aldehydes and ketones?

Accepted Answer

$\mathrm{K_2Cr_2O_7}$

Question 8

Which parent prefix is used for the common name of the aldehyde $\mathrm{HCHO}$?

Accepted Answer

Form-

Question 9

At what number of carbons does a straight-chain ketone become insoluble in water?

Accepted Answer

6

Question 10

Which of the following best describes a hemiacetal?

Accepted Answer

A compound with one $\mathrm{-OR}$ and one $\mathrm{-OH}$ group attached to the same carbon

Question 11

Which of the following reactions will NOT produce an acetal?

Accepted Answer

Reaction of a carboxylic acid with alcohol under acidic conditions

Question 12

Which compound will NOT react with Tollen’s reagent?

Accepted Answer

2-butanone

Question 13

Which of the following is the correct condensed structural formula for acetone?

Accepted Answer

$\mathrm{CH_3COCH_3}$

Question 14

Which of the following is a secondary alcohol?

Accepted Answer

2-propanol

Question 15

Which of the following best explains why aldehydes are more reactive than ketones in nucleophilic addition reactions?

Accepted Answer

Aldehydes have less steric hindrance and a more positive carbonyl carbon.

Question 16

Which of the following is the correct product when formaldehyde is oxidized?

Accepted Answer

Formic acid

Question 17

A cyclic hemiacetal is most commonly found in which type of biological molecule?

Accepted Answer

Carbohydrates

Question 18

Which of the following is the correct line-angle formula for benzaldehyde?

Accepted Answer

A benzene ring with a $\mathrm{-CHO}$ group attached

Question 19

Which of the following statements about solubility is correct?

Accepted Answer

Aldehydes and ketones with fewer than 6 carbons are generally soluble in water.

Aldehydes and Ketones: Structure, Properties, and Reactions

Study Guide - Practice Questions