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The HNH angle value is higher than HPH, ...

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

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It can be explained op the basis of-sp .hybridisation in .NH_3. and only s-p bonding between hydrogen and other elements of the group. .beginarray/lllNH_3 PH_3 AsH_3endarray. .beginarray/llll1078^circ 93.6^circ 9[8^circ. 91.3^circendarray. As we move down the group, the size of the central atom goes on increasing and its electronegativity goes on decreasing. As a result, the bond pairs of clectrons tend to lie away from the central atom as we move from .NH_3. to .SbH_3.. In other words, the force of repulsion between .the adjacent bond pairs is maximum in .NH_3. minimum in .SbH_3.. Consequently the bond angle is maximum in .NH_3. and minimum in .SbH_y.
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V PUBLICATION-The p-BLOCK ELEMENTS-QUESTION BANK
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  2. Give the resonating structures of NO2 and N2 O5

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

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  4. Why does R3P=0 exist but R3N=0 does not. [R = alkyl group]?

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  5. Explain why 'NH3', 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 of white phosphorus and ...

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

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  9. Give the-disproportionation reaction of 'H3 PO3'

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

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  11. Justify the placement of '0, S', Se, Te and 'Po' in the same group of ...

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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 rarr O^- and O rarr O^...

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  15. Describe the manufacture of 'H2 SO4' by contact process.

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  16. How is SO2 an air pollutant?

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  17. Why are halogens strong oxidizing 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, oxygen forms...

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