The correct answer is It is a salt of strong acid and a weak base.Concept:Acid: The substances sour in taste that turn blue litmus red. Base: The substances are bitter in taste, soapy to touch, and turn red litmus blue. Salt: The substances formed by the reaction between an acid and a base. Explanation:Strong Acids: An acid that ionizes completely to give H+ ions in its aqueous solution.Examples: Hydrochloric acid, sulphuric acid, etc. Weak acid: An acid that ionizes partially in a solution and gives off only a few of its H+ ions. Examples: acetic acid, citric acid, etc.Strong Base: A base that ionizes completely to give OH- ions in its aqueous solution.Examples: Sodium hydroxide, potassium hydroxide, etcWeak base: A base that ionizes partially in a solution and gives off only a few of its OH- ions. Examples: magnesium hydroxide, ammonium hydroxide, etc.Ammonium chloride is formed when ammonium hydroxide (a weak base) reacts with hydrochloric acid (a strong acid). Thus, it is a salt of strong acid and a weak base.