Question 1

Which of the following best describes the structural difference between an aldehyde and a ketone?

Accepted Answer

An aldehyde has a carbonyl group bonded to at least one hydrogen atom, while a ketone has the carbonyl group bonded to two carbon atoms.

Question 2

A hospital laboratory receives a sample containing the compound CH3CH2CHO. What is the correct IUPAC name for this compound?

Accepted Answer

Propanal

Question 3

Which of the following compounds contains a formyl group?

Accepted Answer

Formaldehyde

Question 4

A chemist is naming a compound with the formula (CH3)2CHCHO. What is its IUPAC name?

Accepted Answer

2-Methylpropanal

Question 5

Which of the following best explains why ketones cannot be located at the end of a carbon chain?

Accepted Answer

The carbonyl carbon in a ketone must be bonded to two carbon atoms, which is only possible within the chain.

Question 6

A student is asked to provide the common name for CH3CHO. What should they write?

Accepted Answer

Acetaldehyde

Question 7

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

Accepted Answer

Butanal

Question 8

A pharmaceutical company is synthesizing a compound with the structure CH3COCH3. What is the correct IUPAC name for this compound?

Accepted Answer

Propanone

Question 9

Which of the following prefixes is used in the common names of carbonyl compounds with a six-carbon chain?

Accepted Answer

Capro-

Question 10

A compound is named 2-methylbutanal according to IUPAC rules. Which of the following is its correct common name?

Accepted Answer

α-Methylbutyraldehyde

Question 11

Which of the following statements about carboxylic acids is correct?

Accepted Answer

They contain a carbonyl group bonded to a hydroxyl group.

Question 12

A forensic chemist finds a compound with the formula HCHO at a crime scene. What is the IUPAC name and the functional group present?

Accepted Answer

Methanal; formyl group

Question 13

Which of the following best describes the use of the prefix 'oxo-' in organic nomenclature?

Accepted Answer

It is used when the carbonyl group is a substituent on a parent chain.

Question 14

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

Accepted Answer

2-Butanone

Question 15

Which of the following is a correct statement about the nomenclature of aldehydes?

Accepted Answer

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

Question 16

A compound is named acetone in common nomenclature. What is its IUPAC name and what type of compound is it?

Accepted Answer

Propanone; ketone

Question 17

Which of the following best explains why the carbonyl group is highly reactive in organic compounds?

Accepted Answer

The carbonyl carbon is electrophilic due to the polarization of the C=O bond.

Question 18

A patient is exposed to a compound with the formula CH3CH2CH2CHO. What is the common name and the IUPAC name of this compound?

Accepted Answer

Butyraldehyde; butanal

Question 19

Which of the following is the correct structure for a carboxylic acid?

Accepted Answer

R-COOH

Question 20

A chemist wants to name a compound with a carbonyl group as a substituent. Which prefix should they use according to IUPAC rules?

Accepted Answer

Oxo-

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

Study Guide - Practice Questions