Question

which of the following molecules could form hydrogen bonds with an identical molecule?

Explanation:

Hydrogen bonding occurs when a hydrogen atom is bonded to a highly electronegative atom (such as O, N, or F) and interacts with another electronegative atom. The first molecule (acetic acid) has an -OH group. The O-H bond allows for hydrogen bonding between identical molecules. The second molecule (chloroform - like structure, but with three Cl and one H) has no O - H, N - H, or F - H bonds. The third molecule (acetone) has a carbonyl (C = O) group but no H attached to an electronegative atom (O, N, or F) within the molecule itself for hydrogen bonding with an identical molecule.

Answer:

The first molecule (with the -OH group)