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COMEDK2022ChemistryChemical Bonding and Molecular Structure

The P - O bond order in PO ₄³⁻ is

Options

  1. A1
  2. B1.5
  3. C1.45
  4. D1.25

Correct answer

D. 1.25

Step-by-step solution

The phosphate ion PO ₄³⁻ has a central phosphorus atom bonded to four oxygen atoms. The total number of valence electrons is 5 + 4 6 + 3 = 32 . The Lewis structure consists of a central phosphorus atom with four single bonds to oxygen atoms, where each oxygen atom carries a formal charge of -1 except for one double bond to one oxygen atom to satisfy the octet rule for phosphorus. However, resonance structures exist where the double bond is delocalized over all four P - O bonds. The total number of bonds in the reso

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