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Why does R(3)P = O exist but R(3)N = O d...

Why does `R_(3)P = O` exist but `R_(3)N = O` does not (R = alkyl group)?

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`R_3P=O` exists as P due to presence of d-orbitals form
`dpi-ppi` bond with O-atom and hence expands its covalency to five. On the other hand `R_3N=0` does not exist, as N due to absence of d-orbitals in its valence shell cannot expand its covalency beyond four.
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CENGAGE CHEMISTRY ENGLISH-APPENDIX INORGANIC VOLUME 2-Exercises
  1. Give the resonating structures of NO(2) and N(2)O(5).

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  2. The HNH angle value is higher than HPH, HAsH and HSbH angles. Why? ...

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  3. Why does R(3)P = O exist but R(3)N = O does not (R = alkyl group)?

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  4. Explain why NH(3) is basic while BiH3 is only feebly basic.

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  5. Nitrogen exists as diatomic molecule and phosphorus as P(4). Why?

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  6. Write main differences between the properties of white phosphorus and ...

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  7. Why does nitrogen show catenation properties less than phosphorus ?

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  8. Give the disproportionation reaction of H(3)PO(3).

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  9. Can PCl(5) act as an oxidising as well as a reducing agent? Justify.

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  10. Justify the placement of O, S, Se, Te and Po in the same group of the ...

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  11. Why is dioxygen a gas but sulphur a solid?

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  12. Knowing the electron gain enthalpy values for O to O^(-) and O to O^(...

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  13. Which aerosols deplete ozone?

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  14. Describe the manufacture of H(2)SO(4) by contact process?

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  15. How is SO(2) an air pollutant?

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  16. Why are halogens strong oxidising agents?

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  17. Explain why fluorine forms only one oxoacid, HOF.

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  18. Although chlorine and oxygen have nearly same electronegativity yet on...

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  19. Write two uses of ClO(2).

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  20. Why are halogens coloured?

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