Question 1

Which of the following best distinguishes an aldehyde from a ketone based on their structure?

Accepted Answer

Aldehydes have a carbonyl group bonded to at least one hydrogen atom, while ketones have the carbonyl group bonded to two carbon atoms.

Question 2

Which of the following compounds is the IUPAC name for acetaldehyde?

Accepted Answer

Ethanal

Question 3

A chemist oxidizes ethanol in the laboratory. Which compound is most likely formed as the primary product?

Accepted Answer

Ethanal

Question 4

Which of the following is the correct IUPAC name for the compound with the formula (CH3)2CHCHO?

Accepted Answer

2-Methylpropanal

Question 5

A student is given a compound with the formula CH3CH2CH2CHO. What is its common name?

Accepted Answer

Butyraldehyde

Question 6

Which of the following statements about the nomenclature of aldehydes is correct?

Accepted Answer

The suffix '-al' is used in IUPAC names for aldehydes.

Question 7

Which of the following best describes the relationship between methanol and formaldehyde?

Accepted Answer

Methanol can be oxidized to form formaldehyde.

Question 8

A compound is named 3-methylbutanal according to IUPAC rules. What is its common name?

Accepted Answer

α-Methylbutyraldehyde

Question 9

Which of the following compounds contains a carbonyl group bonded to a hydroxyl group?

Accepted Answer

Carboxylic acid

Question 10

A laboratory technician needs to synthesize propanal. Which alcohol should be oxidized to obtain this compound?

Accepted Answer

Propanol

Question 11

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

Accepted Answer

2-Methylpropanal

Question 12

A compound has the formula CH3CH2CH(CH3)CHO. What is its IUPAC name?

Accepted Answer

2-Methylbutanal

Question 13

Which of the following best explains why common names are still widely used for simple aldehydes and ketones in industry?

Accepted Answer

They are shorter and often based on historical or traditional usage.

Question 14

Which of the following is the correct structure for butanal?

Accepted Answer

CH3CH2CH2CHO

Question 15

A student is asked to name the compound with the structure CH3CH2COCH3. Which of the following is correct?

Accepted Answer

Butanone

Question 16

Which of the following prefixes is used in the common names of aldehydes to indicate a four-carbon chain?

Accepted Answer

Butyr-

Question 17

A compound is named valeraldehyde by its common name. What is its IUPAC name?

Accepted Answer

Pentanal

Question 18

Which of the following best describes the difference in the functional group between a ketone and a carboxylic acid?

Accepted Answer

A ketone has a carbonyl group between two carbons, while a carboxylic acid has a carbonyl group bonded to a hydroxyl group.

Question 19

Which of the following is the correct IUPAC name for the compound with the formula CH3CH(CH3)CH2CHO?

Accepted Answer

3-Methylbutanal

Question 20

A patient is exposed to formaldehyde in a laboratory accident. Which of the following is the correct IUPAC name for the compound involved?

Accepted Answer

Methanal

Aldehydes, Ketones, and Carboxylic Acids: Structure, Nomenclature, and Common Names

Study Guide - Practice Questions