Quiz - Aldehydes and Ketones - 1 | Aldehydes and Ketones - Part 1

Organic Chemistry 2 - Quiz - Aldehydes and Ketones - 1


What is the correct IUPAC name for the compound with the molecular formula CH3(CH2)4CHO?

The correct IUPAC name is hexanal. The aldehyde functional group has priority in nomenclature and is assigned the lowest possible locant, which is 1 by default. The name reflects that there are six carbon atoms in the longest chain (hex-), with an aldehyde group at the end (-al).


Which of the following reagents can selectively oxidize primary alcohols to aldehydes without further oxidation to carboxylic acids?

PCC can oxidize primary alcohols to aldehydes under anhydrous conditions, which prevents further oxidation to carboxylic acids. Jones reagent is too strong and often leads to carboxylic acids. Lindlar's catalyst and sodium borohydride are used for reductions, not oxidations.


What is the number of carbon atoms present in the simplest aldehyde and ketone?


Which property is not characteristic of carbonyl-containing compounds?

Carbonyl compounds generally have good solubility in water due to their ability to accept and donate hydrogen bonds because of the polar carbonyl group.


Ketones can be prepared by the oxidation of:


Which of the following statements is correct?

The C=O bond in carbonyls is short, strong, and very polar due to the significant electronegativity difference between carbon and oxygen. The carbon atom of the carbonyl group is electrophilic, as it is electron-deficient, while the oxygen atom is nucleophilic, possessing a partial negative charge. Additionally, the hydrogen on the α carbon of a carbonyl compound is acidic, making it prone to deprotonation.


Which of the following methods results in the synthesis of carbonyls?

Ozonolysis of alkenes results in the synthesis of carbonyl compounds. During ozonolysis, ozone (O3) reacts with an alkene, breaking the carbon-carbon double bond and forming carbonyl compounds.


What is the first step in a nucleophilic addition reaction on a carbonyl group under acidic conditions?

Mechanism of the addition reaction under acidic conditions:


Which of the following reactions results in the formation of an acetal from a carbonyl?

Formation of acetal: