Question 1

Which functional group is present in all carboxylic acids and is responsible for their acidic properties?

Accepted Answer

Carboxyl group

Question 2

What is the correct IUPAC name for the compound with the structure $$\mathrm{CH_3CH_2COOH}$$?

Accepted Answer

Propanoic acid

Question 3

Which of the following statements best explains why carboxylic acids with 1–5 carbon atoms are very soluble in water?

Accepted Answer

They form hydrogen bonds with water molecules.

Question 4

A preservative commonly added to bread to inhibit spoilage by microorganisms is:

Accepted Answer

Sodium propionate

Question 5

Which equation correctly represents the dissociation of ethanoic acid (acetic acid) in water?

Accepted Answer

$$\mathrm{CH_3COOH + H_2O \rightarrow CH_3COO^- + H_3O^+}$$

Question 6

Which of the following is the correct IUPAC name for the compound shown: $$\mathrm{C_6H_4Cl_2COOH}$$ with chlorines at positions 3 and 4?

Accepted Answer

3,4-Dichlorobenzoic acid

Question 7

Which of the following best describes the process of esterification?

Accepted Answer

A carboxylic acid reacts with an alcohol in the presence of an acid catalyst and heat to produce an ester.

Question 8

What is the IUPAC name for the ester formed from methanol and ethanoic acid?

Accepted Answer

Methyl ethanoate

Question 9

Esters are commonly found in which of the following real-world products?

Accepted Answer

Fingernail polish remover (ethyl acetate)

Question 10

Which functional group is present in amides but not in esters?

Accepted Answer

Amino group ($$\mathrm{NH_2$})$$

Question 11

Which of the following best describes the classification of amines?

Accepted Answer

Primary amines have one carbon group bonded to the nitrogen atom.

Question 12

Which of the following amines can form the most hydrogen bonds with itself?

Accepted Answer

Primary amine

Question 13

What is the correct IUPAC name for the amide formed from butanoic acid and dimethylamine?

Accepted Answer

N,N-Dimethylbutanamide

Question 14

Which of the following is a real-world application of alpha hydroxy acids (AHAs)?

Accepted Answer

Used in skin peels to reduce age spots and irregular pigmentation

Question 15

Which of the following statements about the solubility of carboxylic acids in water is correct?

Accepted Answer

Carboxylic acids with fewer than five carbon atoms are very soluble in water.

Question 16

Which of the following is a product of the reaction between propanoic acid and methanol in the presence of heat and an acid catalyst?

Accepted Answer

Methyl propanoate

Question 17

Which compound is responsible for the aroma and flavor of many fruits such as pineapples?

Accepted Answer

Esters

Question 18

Which of the following best describes the naming of esters?

Accepted Answer

The first word is the alkyl group from the alcohol, and the second word is the carboxylate name from the acid.

Question 19

Which of the following is a property of amides that makes acetaminophen (Tylenol) useful as a pain reliever?

Accepted Answer

Amides can reduce fever and pain with little anti-inflammatory effect.

Question 20

Which of the following best describes the preparation of amides?

Accepted Answer

A carboxylic acid reacts with ammonia or a primary/secondary amine and heat to produce an amide and water.

Carboxylic Acids, Esters, Amines, and Amides: Structure, Properties, and Nomenclature

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