32. An acid having basicity one is A.Sodium dihydrogen phosphate B.Disodium hydrogen phosphate C.Sodium phosphate D.Phosphoric acid
Answer: Option B Solution: The basicity of an acid is the number of hydrogen ions (H+) which can be produced by the ionization of one molecule of the acid in aqueous solution. For example, the basicity of hydrochloric acid is 1 since one molecule of HCl produces one H+ ion in solution. Similarly, the basicity of Disodium phosphate (Na2HPO4) is one since it has one H+ displaceable ion.
