question_answer

Which of the following statements is not valid for oxoacids of phosphorus?         [AIPMT (S) 2012]

A) Orthophosphoric acid is used in the manufacture of triple superphosphate

B) Hypophosphorous acid is a diprotic acid

C) All oxoacids contain tetrahedral four coordinated phosphorus

D) All oxoacids contain at least one P=0 unit and one P—OH group

Correct Answer: B

Solution :

[b] Hypophosphorous acid,\[{{H}_{3}}P{{O}_{2}}\], has the following structure.

As it contains only one replaceable H-atom (that is attached with O, not with P directly) so it is a monoprotic acid.

All other given statements are true.