The phosphorus of group 15 and sulphur of group 16 are two industriall

1.	The phosphorus of group 15 and sulphur of group 16 are two industrially important ‘p’ block elements. Their compounds are also industrially important.a) 4H3PO3 \(\overset{heat}{\longrightarrow}\) 3H3PO4+PH3 show that this is a disproportionation reaction.b) PCl3 fumes in moisture. Give reason.c) Sulphuric acid can be manufactured from sulphur using V2O5 as a catalyst.i) Give the name of the method.ii) Outline the principle.
Answer» a) Disproportionation reactions are a special type of redox reaction in which an element in one oxidation state is simultaneously oxidised and reduced. In phosphorous acid (H₃PO₃) phosphorus is in the intermediate oxidation state of +3. It is increased to +4 (oxidation) in phosphoric acid (H₃PO₄) and decreased to – 3 (reduction) in phosphine (PH₃). b) PCI₃ undergoes hydrolysis in presence of moisture giving fumes of HCI. PCI₃ + 3H₂O → H₃PO₃ + 3HCI c) i) Contact Process

The phosphorus of group 15 and sulphur of group 16 are two industrially important ‘p’ block elements. Their compounds are also industrially important.a) 4H3PO3 \(\overset{heat}{\longrightarrow}\) 3H3PO4+PH3 show that this is a disproportionation reaction.b) PCl3 fumes in moisture. Give reason.c) Sulphuric acid can be manufactured from sulphur using V2O5 as a catalyst.i) Give the name of the method.ii) Outline the principle.

Answer»

a) Disproportionation reactions are a special type of redox reaction in which an element in one oxidation state is simultaneously oxidised and reduced. In phosphorous acid (H₃PO₃) phosphorus is in the intermediate oxidation state of +3. It is increased to +4 (oxidation) in phosphoric acid (H₃PO₄) and decreased to – 3 (reduction) in phosphine (PH₃).

b) PCI₃ undergoes hydrolysis in presence of moisture giving fumes of HCI. PCI₃ + 3H₂O → H₃PO₃ + 3HCI

c) i) Contact Process

Discussion

No Comment Found

Related InterviewSolutions

Nitrogen cannot extend its covalency beyond four but it forms wide variety of oxides and also forms oxoacids.1. Name the two oxoacids of nitrogen. 2. Action of nitric acid with metals depends on many factors. Justify.
Nitrogen forms a number of oxides and oxoacids. a) Which of the following is a neutral oxide of Nitrogen.i) N2Oii) N2O5iii) NO2iv) N2O4b) Prepare a short write – up on Nitric acid high lighting its laboratory preparation, chemical properties and uses.ORPhosphorous forms a number of compounds.a) The gas liberated when calcium phosphide is treated with die. HCl isi) Clii) H2iii) PH3iv) All the aboveb) Prepare a short write up on PCl3 and PCI5 highlighting the preparation and chemical properties of PCl3 and structure of PCl5.
XeF6 on complete hydrolysis produces ………… (a) XeOF4 (b) XeO2F3(c) XeO3 (d) XeO2
The molarity of given orthophosphoric acid solution is 2M. its normality is ………… (a) 6N (b) 4N (c) 2N (d) none of these
Mention the uses of nitrogen?
What happen when sodium azide undergoes thermal decomposition?
Bond order for nitrogen molecule is ………… (a) 1 (b) 2 (c) 3 (d) 0
What are pnictogens?
Which one of the following shows isotopes? (a) Nitrogen (b) Arsenic (c) Antimony (d) Bismuth
Nitrogen gas in atmosphere is separated industrially from liquid air by ………… (a) simple distillation (b) Fractional distillation (c) Sublimation (d) Distillation under reduced pressure

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment