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The H - N - H angle value is higher than...

The H - N - H angle value is higher than H-P-H, H-As-H and H-Sb-H angles. Why ?

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In group-15, moving from nitrogen to bismuth, the atomic size increases and electronegativity decreases as a result the electron density on central decreases. Also, the `sp_3` character of central atom becomes less distinct. This results in decrease of bond angles.
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KUMAR PRAKASHAN-THE P-BLOCK ELEMENTS -SECTION-C TEXTUAL EXERCISE
  1. Illustrate how copper metal can give different products on reaction wi...

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  2. Give the resonating structures of NO(2) and N(2)O(5)

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  3. The H - N - H angle value is higher than H-P-H, H-As-H and H-Sb-H angl...

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  4. Why does R3P = O exist but R3N = O does not (R = alkyl group) ?

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

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  6. Nitrogen exists as diatomic molecule and phosphorus as P4. Why ?

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  7. Write main differences between the properties

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

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  9. Give the disproportionation reaction of H3PO3.

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  10. Can PCl5 act as an oxidising as well as a reducing agent ? Justify.

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

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

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  13. Knowing the electron gain enthalpy values for O to O^(-) and O to O^(2...

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  14. Which aerosols deplete ozone ?

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  15. Write the conditions to maximise the yield of H2SO(4) by Contact proc...

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  16. How is SO2 an air pollutant ?

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  17. Why are halogens strong oxidising agents ?

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

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  19. Explain why inspite of nearly the same electronegativity, nitrogen for...

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  20. Write two uses of ClO(2)

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