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MHT CET202019 Oct 2020Evening ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

What is the highest oxidation state possessed by phosphorus in it's oxyacids?

Options

  1. A+6
  2. B+4
  3. C+3
  4. D+5

Correct answer

D. +5

Step-by-step solution

+5+5 is the highest oxidation state possessed by phosphorus in it's oxyacids. In oxoacids phosphorus is tetrahedrally surrounded by other atoms. All these acid contains at least one P = O bond and one P - OH bond. The oxoacids in which phosphorus has maximum oxidation state (+5) is orthophosphoric ( H ₃ PO ₄ ) , pyrophosphoric ( H ₄ P ₂ O ₇ ) and metaphosphoric ( HPO ₃ )_ n .

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