| ⇦ | 
| ⇨ |
In an organic compound phosphorus is estimated as
Options
(a) Mg₂P₂O₇
(b) Mg₃(PO₄)₂
(c) H₃PO₄
(d) P₂O₅
Correct Answer:
Mg₂P₂O₇
Explanation:
A pre-weighed amount of organic compound is heated with concentrated nitric acid (HNO₃) in a tube. Phosphorus present in the compound gets converted into phosphoric acid. Now the content of tube are heated with magnesium mixture i.e MgSO₄ + NH₄Cl + NH₄OH, so that magnesium ammonium phosphate MgNH₄PO₄ is formed which is collected, washed, dried and ignited to get magnesium pyrophosphate Mg₂ P₂O₇, which is then weighed. H₃PO₄ → MgNH₄PO₄ + 3HCl(Magnesium ammonium phosphate (white ppt.). 2MgNH₄PO₄ → Mg₂P₂O₇ ↓ + 2NH₃ + H₂O. Knowing the weight of Mg₂P₂O₇, percentage of phosphorus can be calculated.
Related Questions: - The fractional distillation is used in
- If diazotisation of aniline is carried out at 30⁰ C,the main organic product
- Formula of Plaster of Paris is
- The strained tetracyclic alkane is isomerized thermally to the cyclic alkene.
- If the ratio of the rates of diffusion of two gases A and B is 4 : 1. Then the ratio
Topics: Basic Principles of Organic Chemistry
(124)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The fractional distillation is used in
- If diazotisation of aniline is carried out at 30⁰ C,the main organic product
- Formula of Plaster of Paris is
- The strained tetracyclic alkane is isomerized thermally to the cyclic alkene.
- If the ratio of the rates of diffusion of two gases A and B is 4 : 1. Then the ratio
Topics: Basic Principles of Organic Chemistry (124)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply