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The experimentally determined N-F bond l...

The experimentally determined `N-F` bond length in `NF_(3)` is greater than the sum of the covalent radii of `N` and `F`. Assign reason.

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Both nitrogen and fluorine atoms have very small size. Therefore, there is high electron density between the two atoms. This leads to repulsion in the bonded electrons and as a result, bond length of N-F bond is more than the sum of the covalent radii of the two atoms.
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(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 .

The experimentally determined N-F bond length in NF_(3) is _____than the sum of the single covalent bond radii of N and F .

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

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  2. Molecular nitrogen is very inert chemically. Why ?

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

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

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

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

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

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

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

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

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

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

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

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

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  15. Ammonia acts as a ligand. Discuss.

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

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

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

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

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

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