Quiz - Carboxylic Acids - 2 | Carboxylic Acids

Organic Chemistry 2 - Quiz - Carboxylic Acids - 2


Which of the following is the correct IUPAC name for CH3-CH2-COOH?

Propanoic acid is the correct IUPAC name because the compound has a three carbon alkyl chain. The '-oic acid' suffix is used for carboxylic acids.


Which property of carboxylic acids contributes to their high boiling points relative to hydrocarbons of similar molecular weight?

Hydrogen bonding between the -OH groups of carboxylic acids contributes to their high boiling points. This intermolecular force is much stronger than the Van der Waals forces present in hydrocarbons.


What is the reason for the high acidity of carboxylic acids compared to alcohols?

The carboxylate ion resulting from the deprotonation of a carboxylic acid is resonance stabilized, which increases the acidity of carboxylic acids compared to alcohols that lack this stabilization.


Which substituent would increase the acidity of a carboxylic acid when attached to the alpha-carbon?

Electron-withdrawing groups such as a nitro group increase the acidity of carboxylic acids by stabilizing the negative charge of the carboxylate ion through resonance and inductive effects.


Which of the following statements is correct?

The hydrogen of carboxylic acids is very acidic: pKa ~ 4-5 (carboxylate ion is stabilized by resonance)
-COOH forms hydrogen bonds with other -COOH or polarized molecules ⇒ carboxylic acids have high melting and boiling points
The carbon of the carbonyl bond is electrophilic while oxygen is nucleophilic


How does the introduction of halogen substituents at the α-position affect the acidity of carboxylic acids?

Halogen substituents at the α-position of carboxylic acids increase acidity due to their inductive electron-withdrawing effect, stabilizing the carboxylate anion.


Which of the following methods results in the synthesis of carboxylic acids?

Carbonation of organometallic reagents:


What product is primarily formed when a carboxylic acid is reduced with lithium aluminium hydride (LiAlH4)?

Lithium aluminium hydride (LiAlH4) is a strong reducing agent that reduces carboxylic acids to primary alcohols.


Which method can be used for the synthesis of carboxylic acids from primary alcohols or aldehydes?

The oxidation of primary alcohols or aldehydes with strong oxidizing agents, such as potassium dichromate or potassium permanganate, yields carboxylic acids.


Which of the following chemical functions is not a carboxylic acid derivative?