Hydroxyl group is a common polar group with the chemical formula -OH. Hydroxyl groups have some similar properties with water. Hydroxyl group is a typical polar group, which can form hydrogen bonds with water, which is different from hydroxide in alkali.
In organic matter, in the systematic nomenclature of organic chemistry, simple hydrocarbon groups followed by hydroxyl groups are called alcohols, while sugars are mostly polyhydroxyaldehydes or ketones.
The hydroxyl group directly attached to the benzene ring is called phenol.
Alcohol hydroxyl group does not show acidity, phenolic hydroxyl group and carboxyl group show weak acidity, so phenol and acetic acid can react with sodium, phenolic hydroxyl group is weaker than carbonic acid and stronger than bicarbonate; Carboxyl groups are stronger than carbonic acid.
Ethanol (common name: alcohol) of common compounds is non-electrolyte and does not show acidity. Only the hydrogen on the hydroxyl group in ethanol can be ionized, so when it reacts with sodium, two ethanol molecules and two sodium atoms react to form a hydrogen molecule.
I hope it can help you solve the problem.