Explain about the test for phosphorous in an organic compound.

1.	Explain about the test for phosphorous in an organic compound.
Answer» SOLUTION :(i) A solid organic compound strongly heated with a MIXTURE of `Na_(2)CO_(3)` and `KNO_(3)` . Phosphorous present in the compound is oxidised to sodium phosphate. (ii) The residue is extracted with water and boiled with conc. `HNO_(3)` . A solution of ammonium molybdate is added to this solution (iii) A CANARY yellow PRECIPITATE SHOWS the presence of phosphorous.

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