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How phosphine is prepared in the laborat...

How phosphine is prepared in the laboratory ?

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Phosphine is prepared by heating white phosphorus with Cone. `NaOH` solution .
`P_(4)+3NaOH+3H_(2)OrarrPH_(3)+3NaH_(2)PO_(2)`
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SUBHASH PUBLICATION-THE 'P'-BLOCK ELEMENTS-EXERCISE
  1. Give two differences between white phosphorus and red phosphorus.

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  2. How is phosphine prepared from calcium phosphide ?

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  3. How phosphine is prepared in the laboratory ?

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  4. Show that PH(3) is basic in nature.

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  5. Give reason: PH(3) has lower melting point than NH(3)

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  6. Give reason: Nitrogen is less reactive at room temperature.

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  7. Which allotropic from of phosphorus has discrete tetrahedral P molecul...

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  8. Bond angle in PH4+ is higher that in PH(3). Why?

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  9. Name the acid obtained when PCl(5) undergoes hydrolysis, Give equatio...

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  10. White phosphorous is heated with excess of dry chlorine to get X. X on...

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  11. Are all the five bonds of PCl(5) equivalent ? Justify your answer.

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  12. Write the structure for the following oxoacids of phosphorus. (i) Hy...

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  13. How do you account of the reducing behaviour for H(3)PO(2) ?

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  14. Mention any two reasons for the anomalous behaviour of oxygen.

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  15. H(2)S is less acidic than H(2)Te. Give reason.

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  16. Among the following which one is more acidic ? Give reason. H(2)O,H(...

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  17. Why is H(2)O a liquid and H(2)S a gas?

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  18. Give an example for amphoteric oxide.

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  19. Describe the preparation of Ozonised oxygen with an equation. Name the...

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  20. Give two examples to show that ozone is in oxidising agent.

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