Solution:
Concept- Substances can be classified as acidic, basic and neutral on the basis of their chemical properties.Acidic substances release hydrogen ions () in their solution, basic substances release hydroxide ions () in their solution and neutral substances has equal number of hydrogen ions and hydroxide ions.Now, acids are sour in taste, sugar is sweet and bases are bitter. Salts are formed on reaction of acids and bases. Bases are also soapy to touch While salt and sugar are crystalline solids.
Thus, bases are soapy to touch and have a bitter taste.
Hence, the correct answer is 2.
