Question 1

Which of the following statements best explains why carboxylic acids have higher boiling points than alcohols of similar molar mass?

Accepted Answer

Carboxylic acids form strong hydrogen bonds and often exist as dimers, increasing intermolecular forces.

Question 2

Which reagent is commonly used to convert a carboxylic acid ($$RCOOH) to an $$acid chloride ($$RCOCl$$)?

Accepted Answer

$$\mathrm{$$SOCl_2$$}$$

Question 3

A student wants to separate a mixture of benzoic acid and phenol using acid-base extraction. Which aqueous solution should be used to selectively extract benzoic acid into the aqueous layer?

Accepted Answer

Aqueous $$\mathrm{$$NaHCO_3$$}$$

Question 4

Which of the following carboxylic acids is the strongest acid based on pKa values?

Accepted Answer

Trifluoroacetic acid ($$pK_a = 0.2)$$

Question 5

Which of the following best describes the resonance stabilization of the carboxylate anion ($$RCOO^-$$)?

Accepted Answer

The negative charge is delocalized equally over both oxygen atoms.

Question 6

Which of the following is NOT a correct IUPAC name for a carboxylic acid derivative?

Accepted Answer

Methyl butanoic acid

Question 7

Which of the following statements about Fischer esterification is correct?

Accepted Answer

It is an equilibrium reaction driven by excess alcohol and removal of water.

Question 8

Which of the following best explains why diacids such as adipic acid have two different pKa values?

Accepted Answer

The second deprotonation is less favorable due to increased negative charge repulsion.

Question 9

Which of the following is a correct description of the boiling point trend for carboxylic acids compared to ketones and alcohols of similar molar mass?

Accepted Answer

Carboxylic acids \u003e Alcohols \u003e Ketones

Question 10

Which of the following is a key reason why amides have higher boiling points than esters?

Accepted Answer

Amides have both strong dipole-dipole interactions and hydrogen bonding.

Question 11

Which of the following is the correct product of the reaction: $$RCOOH + $$SOCl_2$$ \rightarrow$$ ?

Accepted Answer

$$RCOCl$$

Question 12

Which of the following statements about the hydrolysis of esters is correct?

Accepted Answer

Base-catalyzed hydrolysis (saponification) is irreversible because the carboxylate salt is formed.

Question 13

Which of the following is a correct IUPAC name for the compound with the structure $$CH_3CH_2COOCH_3$$?

Accepted Answer

Methyl propanoate

Question 14

Which of the following is a correct statement about the solubility of small esters in water?

Accepted Answer

Small esters are somewhat soluble in water due to their ability to accept hydrogen bonds.

Question 15

Which of the following best describes the role of triethylamine (TEA) in the formation of esters from acid chlorides?

Accepted Answer

TEA acts as a base to neutralize the HCl produced during the reaction.

Question 16

Which of the following is a correct statement about the hydrolysis of amides?

Accepted Answer

Amide hydrolysis is much slower than ester hydrolysis and requires strong acid or base.

Question 17

Which of the following is a correct IUPAC name for the compound with the structure $$C_6H_5CONH_2$$?

Accepted Answer

Benzamide

Question 18

Which of the following is a correct description of the product formed when a nitrile is hydrolyzed under acidic conditions?

Accepted Answer

A carboxylic acid

Question 19

Which of the following is a correct statement about the use of carbodiimides (e.g., DCC) in organic synthesis?

Accepted Answer

Carbodiimides are used to activate carboxylic acids for amide bond formation.

Carboxylic Acids and Their Derivatives: Structure, Properties, and Reactions

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