Multiple choice Which of the following is not a property of a base? Bases have bitter taste. Bases feel soapy to touch. Bases turn red litmus to blue. Bases react with some metals to form hydrogen gas. Bases react with metal oxides to form salt and water. Reveal answer Fill a bubble to check yourself E Correct answer Explanation This is the correct option as this is not a property of a base. Bases react with non-metal oxides to form salt and water.