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JEE Main202227 Jul 2022Morning ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula?

Options

  1. APyrophosphorous acid
  2. BHypophosphoric acid
  3. CPhosphoric acid
  4. DPyrophosphoric acid

Correct answer

D. Pyrophosphoric acid

Step-by-step solution

In oxoacids phosphorus is tetrahedrally surrounded by other atoms. All these acids contain at least one P = O bond and one P – OH bond. Pyrophosphorous acid → H 4 P 2 O 5 . Hypophosphoric acid → H 4 P 2 O 6 . Phosphoric acid → H 3 PO 4 . Pyrophosphoric acid → H 4 P 2 O 7 .

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