question_answer

Which one is correct statement?

A)  Basicity of \[{{H}_{3}}P{{O}_{4}}\] and \[{{H}_{3}}P{{O}_{3}}\] is 3 and 3 respectively

B)  Acidity of \[{{H}_{3}}P{{O}_{4}}\] and \[{{H}_{3}}P{{O}_{3}}\] is 3 and 3 respectively

C)  Acidity of \[{{H}_{3}}P{{O}_{4}}\] and \[{{H}_{3}}P{{O}_{3}}\] is 3 and 2 respectively

D)  Basicity of \[{{H}_{3}}P{{O}_{4}}\] and \[{{H}_{3}}P{{O}_{3}}\] is 3 and 2 respectively

Correct Answer: D

Solution :

                Orthophosphoric acid \[({{H}_{3}}P{{O}_{4}})\]is a tribasic acid because it has three replaceable hydrogen atoms. Hence, the basicity of \[{{H}_{3}}P{{O}_{4}}\] is 3. Its structure is as While phosphorus acid \[({{H}_{3}}P{{O}_{4}})\] is a dibasic acid because it has two replaceable hydrogen atom. Hence, the basicity of \[{{H}_{3}}P{{O}_{4}}\] is 2. Its structure is as