The responses that can form hydrogen bonds with water molecules are
II. CH₃COOH and IV. CH₃NH₂.
Acetic or ethanoic acid (CH₃COOH) has hydrogen atom bonded to an oxygen atom, so it can form hydrogen bonds with water molecules (see the picture below).
Methylamine (CH₃NH₂) has hydrogen atom bonded to a nitrogen atom, so it can form hydrogen bonds with water molecules.
Hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (H), covalently bound to a highly electronegative atom such as flourine (F), oxygen (O) and nitrogen (N) atoms.
Sodium (Na) and ethane can not form hydrogen bonds, because they do not have a hydrogen atom bonded to flourine (F), oxygen (O) and nitrogen (N) atoms.
More about hydrogen bond: brainly.com/question/11679211
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