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Why pure PH3 does not burn in air but im...

Why pure `PH_3` does not burn in air but impure sample does ?

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Impure sample of `PH_3` contains `P_2H_4`, the liquid hydride, which catches fire as soon as it comes in contact with air.
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CENGAGE CHEMISTRY-P-BLOCK GROUP 15 ELEMENTS - THE NITROGEN FAMILY-Concept Application Exercises 2.1 (Subjective)
  1. Burning magnesium continues to burn in nitric oxide, while burning sul...

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  2. Why pure PH3 does not burn in air but impure sample does ?

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  3. Why nitrogen is inert at room temperature ?

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  4. Why BiH3 is strongest reducing agent amongst group 15 hydrides ?

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  5. Why nitrogen trihalide cannot be oxidised to pentahalide whereas phosp...

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  6. NO is paramagnetic, while NO^(oplus) is diamagnetic.

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  7. Which of the following acts as reducing agent and why ? H3 PO3 or H3 P...

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  8. Nitrogen is a gas, while other members of group 15 are solids. Why ?

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  9. Why commercial HNO3 is generally yellow in colour ?

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  10. Nitric acid acts as an oxidising agent while nitrous acid can act both...

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  11. Which is more basic and why ? NF3 or NH3.

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  12. What is the chemistry of Holme's signal ?

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  13. Write complete balanced reactions for the following : (a) Red phosph...

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  14. Describe the action of heat on the following compounds : (a) Ammoniu...

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  15. Concentrated nitric acid can be stored in aluminium container. Give re...

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  16. Why calcuim cyanamide can be used as a fertiliser ?

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  17. Describe being odd electron molecule, NO is colourless. Explain.

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  18. Give reason : Urea is better nitrogenous fertiliser than ammonium sulp...

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  19. Mg3 N2 on reaction with water gives off NH3, but MgCl2 on reaction wit...

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  20. Oxides of nitrogen have open chain structures while those of phosphoro...

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