Final answer:
Aldehydes and ketones cannot form hydrogen bonds with themselves, resulting in lower boiling points compared to alcohols but higher than alkanes.
Step-by-step explanation:
The question asks whether aldehydes and ketones can form hydrogen bonds with another molecule of the same substance. An aldehyde has a carbonyl group connected to at least one hydrogen, while in a ketone, the carbonyl carbon is bonded to two other carbons.
It is worth noting that while both aldehydes and ketones can form hydrogen bonds with water, due to the polarity and the partially negative charge on the oxygen atom, they cannot form hydrogen bonds with themselves.
This lack of self-hydrogen bonding results in their boiling points being generally lower than those of alcohols, but higher than those of alkanes due to dipole-dipole interactions.
No, aldehydes and ketones cannot hydrogen bond with another molecule of the same substance. Both aldehydes and ketones have a carbonyl group, which consists of a carbon-oxygen double bond.
While aldehydes have a hydrogen atom bonded to the carbonyl carbon, ketones have two carbon atoms bonded to the carbonyl carbon.
In both cases, the carbonyl oxygen atom can form weak hydrogen bonds, but these bonds cannot form between molecules of the same aldehyde or ketone. Instead, aldehydes and ketones can form weak hydrogen bonds with water through the carbonyl oxygen atom.