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Question: Answered & Verified by Expert
In an organic compound phosphorus is estimated as
ChemistryGeneral Organic ChemistryAP EAMCETAP EAMCET 2021 (23 Aug Shift 2)
Options:
  • A $\mathrm{Mg}_3\left(\mathrm{PO}_4\right)_2$
  • B $\mathrm{P}_2 \mathrm{O}_5$
  • C $\mathrm{Mg}_2 \mathrm{P}_2 \mathrm{O}_7$
  • D $\mathrm{H}_3 \mathrm{PO}_4$
Solution:
1447 Upvotes Verified Answer
The correct answer is: $\mathrm{Mg}_2 \mathrm{P}_2 \mathrm{O}_7$
In organic compound, phosphorus can be estimate by precipitating it as $\mathrm{MgNH}_4 \mathrm{PO}_4$, by adding magnesia mixture. On ignition of precipitate, it yields $\mathrm{Mg}_2 \mathrm{P}_2 \mathrm{O}_7$.

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