Which of the following is called hydrated proton?

Explanation

The correct answer is Hydronium ion. When an acid dissolves in water, the hydrogen ion (H+) does not exist freely but associates with a water molecule to form the hydronium ion (H3O+), which is commonly referred to as a hydrated proton.The Oxonium ion is another name for the hydronium ion, but it is not as widely used as 'hydronium ion' for this specific context. The term Hydroxonium ion is incorrect and does not exist in proper chemical nomenclature. The Hydroxyl ion (OH-) is related to bases, not acids, and does not involve a hydrated proton.