Q. Which of the following statements is not valid for oxoacids of phosphorus?
A) All oxoacids contain at least one P=O unit and one P–OH group
B) Orthophosphoric acid is used in the manufacture of triple superphosphate
C) Hypophosphorous acid is a diprotic acid
D) All oxoacids contain tetrahedral four coordinated phosphorus
Explanation
[Solution from source] Hypophosphorous acid, H₃PO₂, has two P–H bonds and only one P–OH group, so it is monoprotic (monobasic), not diprotic. All phosphorus oxoacids do contain tetrahedral four-coordinated P with at least one P=O and one P–OH, and H₃PO₄ is used to make triple superphosphate. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.