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Why does NH3 form hydrogen bond but PH3 ...

Why does `NH_3` form hydrogen bond but `PH_3` does not ?

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Due to large difference in the electronegativities of nitrogen and hydrogen, N-H bond is highly polar which results in formation of intermolecular hydrogen bonding. In case of `PH_3`, the P-H bonds are non-polar and thus it does not form H-bonds.
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KUMAR PRAKASHAN-THE P-BLOCK ELEMENTS -SECTION-C TEXTUAL EXERCISE
  1. Why does the reactivity of nitrogen differ from phosphorus ?

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  2. Discuss the trends in chemical reactivity of group-15 elements.

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  3. Why does NH3 form hydrogen bond but PH3 does not ?

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  4. How is nitrogen prepared in the laboratory ? Write the chemical equati...

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  5. How is ammonia manufactured industrially ?

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  6. Illustrate how copper metal can give different products on reaction wi...

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

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

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

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

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

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  12. Write main differences between the properties

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

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  14. Give the disproportionation reaction of H3PO3.

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

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

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

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

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  19. Which aerosols deplete ozone ?

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

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