Hypophosphorous 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. All other given statements are true.
NEET UG 2012 — Chemistry Inorganic Chemistry
Which of the following statements is not valid for oxoacids of phosphorus?
Held on 30 Apr 2012 · Verified 9 Jul 2026.
Orthophosphoric acid is used in the manufacture of triple superphosphate
Hypophosphorous acid is a diprotic acid
All oxoacids contain tetrahedral four coordinated phosphorus
All oxoacids contain at least one P=O unit and one P−OH group
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Which of the following is the most electronegative element?
Out of the following complex compounds, which of the compound will be having the minimum conductance in solution?
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