The hetero elements in organic compound are nitrogen, halogen, sulphur and phosphorousd, Nitrogen is estimated by Duma's method (or) Kjeldahl's method. The other hetero elements are estimated using Carius method.The substance used in the estimation of phosphorous is

The hetero elements in organic compound are nitrogen, halogen, sulphur

1.	The hetero elements in organic compound are nitrogen, halogen, sulphur and phosphorousd, Nitrogen is estimated by Duma's method (or) Kjeldahl's method. The other hetero elements are estimated using Carius method.The substance used in the estimation of phosphorous is
Answer» Conc. `H_(2)SO_(4)` fuming sulphuric ACID and `MgCl_(2)` Conc. `HNO_(3).NaOH` fuming nitric acid and magnesia mixture SOLUTION :Phosphorous is precipitated as `Mg_(2)P_(2)O_(7)` by heating the organic COMPOUND with fuming `HNO_(3)` and magnesia mixture.