Alcohol, Phenol and EtherHard

Question

Which of the following statements is not valid for oxoacids of phosphorus ?

Options

A.Orthophosphoric acid is used in the manufacture of triple super phosphate
B.Hypophosphorus acid is a diprotic acid
C.All oxoacids contain tetrahedral four coordinated phosphorus
D.All oxoacids contain at least on P = O unit and one P - OH group

Solution

Hypophosphorus acid, H3PO2 , 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.

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