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NEET2012Chemistryp Block Elements (Group 15, 16, 17 & 18)Actual

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

Options

  1. AOrthophosphoric acid is used in the manufacture of triple superphosphate
  2. BHypophosphorous acid is a diprotic acid
  3. CAll oxoacids contain tetrahedral four coordinated phosphorus
  4. DAll oxoacids contain at least one P = O unit and one P - OH group

Correct answer

B. Hypophosphorous acid is a diprotic acid

Step-by-step solution

Hypophosphorous acid, H ₃ PO 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.

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