Question 1

Which of the following statements correctly distinguishes between an aldehyde and a ketone?

Accepted Answer

Aldehydes have the carbonyl group at the end of the carbon chain, while ketones have it within the chain.

Question 2

What is the IUPAC name for the compound with the formula CH3CH2CHO?

Accepted Answer

Propanal

Question 3

Which of the following compounds is a carboxylic acid?

Accepted Answer

CH3COOH

Question 4

A compound is named 2-methylpropanal in IUPAC nomenclature. What is its common name?

Accepted Answer

Isobutyraldehyde

Question 5

Which of the following best describes the functional group present in all carboxylic acids?

Accepted Answer

A carbonyl group bonded to a hydroxyl group

Question 6

A student is given a compound with the formula (CH3)2CHCHO. What is the correct IUPAC name for this compound?

Accepted Answer

2-Methylpropanal

Question 7

Which of the following is the correct structural formula for a ketone?

Accepted Answer

R-CO-R'

Question 8

A chemist wants to name a compound with the structure CH3COCH3. Which of the following is the correct IUPAC name?

Accepted Answer

Propanone

Question 9

Which prefix is used in the common names of carbonyl compounds with a four-carbon chain?

Accepted Answer

Butyr-

Question 10

A compound is named 'formaldehyde' in common nomenclature. What is its IUPAC name and structure?

Accepted Answer

Methanal, HCHO

Question 11

Which of the following best explains why systematic IUPAC naming is important in organic chemistry?

Accepted Answer

It allows chemists to deduce the structure and functional group position from the name.

Question 12

A molecule is named 'propanone' in IUPAC nomenclature. Which of the following is its correct common name and structure?

Accepted Answer

Acetone, CH3COCH3

Question 13

Which of the following compounds contains the carbonyl group as a substituent and not as the main functional group?

Accepted Answer

A compound named with the prefix 'keto-' or 'oxo-'

Question 14

A patient is exposed to formaldehyde in a laboratory accident. Which of the following best describes the structure and classification of this compound?

Accepted Answer

It is an aldehyde with the formula HCHO.

Question 15

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

Accepted Answer

Butanal

Question 16

A compound is named 'acetaldehyde' in common nomenclature. What is its molecular formula and IUPAC name?

Accepted Answer

CH3CHO, Ethanal

Question 17

Which of the following best describes the difference in the general formulas of aldehydes and ketones?

Accepted Answer

Aldehydes: R-CHO; Ketones: R-CO-R'

Question 18

A student is asked to name the compound CH3CH(CH3)CH2CHO. What is the correct IUPAC name?

Accepted Answer

2-Methylbutanal

Question 19

Which of the following is the correct common name for the compound with the formula CH3CH2CH2CHO?

Accepted Answer

Butyraldehyde

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

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