JEE Main · 2023 · Shift-IhardPB12-014

The number of P-O-P bonds in H4P2O7, (HPO3)3, and P4O10 are respectively

p-Block Elements (Class 12) · Class 12 · JEE Main Previous Year Question

Question

The number of P−O−P\mathrm{P-O-P} bonds in H4P2O7\mathrm{H_4P_2O_7}, (HPO3)3\mathrm{(HPO_3)_3}, and P4O10\mathrm{P_4O_{10}} are respectively

Options
  1. a

    0,3,60, 3, 6

  2. b

    0,3,40, 3, 4

  3. c

    1,2,41, 2, 4

  4. d

    1,3,61, 3, 6

    ✓
Correct Answerd

1,3,61, 3, 6

Detailed Solution

Strategy: Count the number of oxygen atoms bridging two phosphorus atoms in each structure.

Step 1: Structural Counting

  • Pyrophosphoric acid (\ceH4P2O7)(\ce{H4P2O7}): Linked once (\ceO3P−O−PO3)(\ce{O3P-O-PO3}) giving 1 \ceP−O−P\ce{P-O-P} bond.
  • Cyclotrimetaphosphoric acid (\ce(HPO3)3)(\ce{(HPO3)3}): A cyclic trimer with a six-membered ring containing 3 \ceP−O−P\ce{P-O-P} bonds.
  • Phosphorus pentoxide (\ceP4O10)(\ce{P4O10}): Features a tetrahedral cage with 6 oxygen atoms bridging the edges, hence 6 \ceP−O−P\ce{P-O-P} bonds.

Step 2: Final Comparison The values are 1,3,1, 3, and 66.

Answer: (Option) [d] 1, 3, 6\boxed{\text{Answer: (Option) [d] 1, 3, 6}}

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The number of P-O-P bonds in H4P2O7, (HPO3)3, and P4O10 are respectively (JEE Main 2023) | Canvas Classes