Question 81 of 83
Q.In an Organic compound, Phosphorus is estimated as :
(a) Mg2P2O7
(b) Mg3(PO4)2
(c) H3PO4
(d) P2O5
Puducherry TnboardTamil Nadu HSC First Year (DGE) Board 2026MCQ· 1mImportance★★★★★est
98% · 81/83 Questions
You're viewing a preview — the full solution, concept, methods & PYQ mapping are locked.
Start your 14-day free trial to unlock the full solution →The question asks the form in which phosphorus is estimated during the quantitative analysis of an organic compound.
Phosphorus is estimated as magnesium pyrophosphate, Mg2P2O7.
In the estimation of phosphorus, a known mass of the organic compound is heated with an oxidising agent (such as fuming nitric acid) so that the phosphorus is converted to phosphoric acid (H3PO4). This is then precipitated as magnesium ammonium phosphate (MgNH4PO4) by adding magnesia mixture. On strong ignition, the magnesium ammonium phosphate is converted to magnesium pyrophosphate, Mg2P2O7, which is weighed. …
Unlock everything free for 14 days
- Full step-by-step solutions
- Concept-first explanations
- Methods, shortcuts & mistakes
- PYQ mapping + timed mock tests
Full access for 14 days. No credit card required.