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

Orthophosphoric acid is used in the manufacture of triple superphosphate

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Hypophosphorus acid is a diprotic acid

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All oxoacids contain tetrahedral four co-ordinated phosphorus

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All oxoacids of phosphorus contain at least one P=O unit and one P-OH group.

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Solution

The correct option is B Hypophosphorus acid is a diprotic acid
Option 1- Orthophosphoric acid is used in the manufacture of triple superphosphate

Option 2- Hypophosphorus acid is a monoprotic acid. $H_{3} P O_{2}$ contains one $P - O H$ group.

Option3- All oxoacids contain tetrahedral four co-ordinated phosphorus

Option 4- All oxoacids of phosphorus contain at least one P=O unit and one P-OH group.

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