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

`H_(3)PO_(3)` is a diprotic acid. Justify.

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In the structural formula, phosphorus acid `(H_(3)PO_(3))` has only two OH groups and therefore, there are only two ionisable hydrogen atoms. Since the third hydrogen atom is attached directly to the phosphorus atom, it is not ionised. Thus, the acid is diprotic in nature.
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DINESH PUBLICATION-THE P-BLOCK ELEMENTS -Concept Based Questions
  1. NF(3) is not hydrolysed while NCl(3) can be readily hydrolysed. Explai...

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

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

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

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

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

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

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

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

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

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

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  12. Ammonia acts as a ligand. Discuss.

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

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

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

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

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

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  18. MgN(2) when reacted with water gives NH(3) and HCl. However, MgCl(2) d...

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  19. A water soluble compound of a posisonous element M when heated with Zn...

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  20. (SiH(3)) is a weaker base than (CH(3))(3)N. Explain.

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