Home
Class 12
CHEMISTRY
PF(5) is known but NF(5) is not known. D...

`PF_(5)` is known but `NF_(5)` is not known. Discuss.

Text Solution

Verified by Experts

Nitrogen does not have any `2d` orbitals in its valence shell. Therefore, it cannot extend its covalency upto five. But in case of phosphorus, vacant `3d` orbitals are present. An electron can be promoted from `3s` to `3d` orbital. As a result, phosphorus can extend its covalency upto five and a molecule of `PF_(5)` can exist.
Promotional Banner

Topper's Solved these Questions

  • THE P-BLOCK ELEMENTS

    DINESH PUBLICATION|Exercise N.C.E.R.T In-Text Questions|34 Videos

  • THE P-BLOCK ELEMENTS

    DINESH PUBLICATION|Exercise N.C.E.R.T. Exercise|40 Videos

  • THE P-BLOCK ELEMENTS

    DINESH PUBLICATION|Exercise Problem 3|1 Videos

  • THE OXYGEN FAMILY

    DINESH PUBLICATION|Exercise PREPARATORY PACKAGE|14 Videos

Similar Questions

Explore conceptually related problems

(a) PF_5 is known, but NF_5 is not. Why ? (b) The experimentally determined N-F bond length in NF_3 is greater than the sum of single convalent radii of N and F .

DINESH PUBLICATION-THE P-BLOCK ELEMENTS -Concept Based Questions
  1. PF(5) is known but NF(5) is not known. Discuss.

    Text Solution

    |

  2. Molecular nitrogen is very inert chemically. Why ?

    Text Solution

    |

  3. The experimentally determined N-F bond length in NF(3) is greater than...

    Text Solution

    |

  4. NF(3) is not hydrolysed while NCl(3) can be readily hydrolysed. Explai...

    Text Solution

    |

  5. Nitrogen and chlorine have same electronegativity (3.0). Molecular nit...

    Text Solution

    |

  6. H(3)PO(3) is a diprotic acid. Justify.

    Text Solution

    |

  7. NF(3) " and " NH(3) are both pyramidal but differ widely in dipole mom...

    Text Solution

    |

  8. All bonds in the molecule of PCl(5) are not equivalent. Explain.

    Text Solution

    |

  9. PCl(5) acts as a chlorinating agent in organic reactions. Why ?

    Text Solution

    |

  10. Boiling point of phosphine is less than that of ammonia though its mol...

    Text Solution

    |

  11. On heating, (NH(3))(2)Cr(2)O(7) gives rise to a gas which on treatment...

    Text Solution

    |

  12. Phosphorus acid can act both as oxidising agent as well as reducing ag...

    Text Solution

    |

  13. Ammonia has a higher proton affinity than phosphine. Discuss.

    Text Solution

    |

  14. Oxides of phosphorus have cage like and not open structures. Explain.

    Text Solution

    |

  15. Ammonia acts as a ligand. Discuss.

    Text Solution

    |

  16. Why does nitric oxide become brown when released in air ?

    Text Solution

    |

  17. There is a small increase in atomic radius in moving from P to As in g...

    Text Solution

    |

  18. H(3)PO(2) and H(3)PO(3) act as good reducing agents while H(3)PO(4) do...

    Text Solution

    |

  19. Give reasons for the following : (a) CN^(-) ion is known but CP^(-) ...

    Text Solution

    |

  20. Explain why both N and Bi do not form pentahalides while phosphorus do...

    Text Solution

    |