Answer:
The type of compound that is formed by the addition of hydroxyl group is known as alcohol.
Step-by-step explanation:
Hydroxyl group is added to a compound by substitution reaction in which the -OH group replaces a nucleophile such as Cl-.
For example methyl chloride reacts with potassium hydroxide(KOH) to generate methyl alcohol or methanol and potassium chloride(KCl)
CH3Cl+KOH=CH3OH+KCl