Q. Which one is correct statement?
A) Basicity of H_{3}PO_{4} and H_{3}PO_{3} is 3 and 3 respectively
B) Acidity of H_{3}PO_{4} and H_{3} PO_{3} is 3 and 3 respectively
C) Acidity of H_{3}PO_{4} and H_{3} PO_{3} is 3 and 2respectively
D) Basicity of H_{3}PO_{4} and H_{3} PO_{3} is 3 and 2 respectively
Explanation
(d)
Orthophosphoric acid (H_{3}PO_{4}) is a tribasic acid because it has three replaceable hydrogen atoms. Hence the basicity of H_{3} PO_{3}is 3. Its structure is as
[image:7_image30.emf]
While phosphorous acid(H_{3}PO_{4} ) dibasic acid because it has two replaceable hydrogen atoms. Hence the basicity of H_{3} PO_{3} is 2 .Its structure is as
[image:7_image31.emf]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.