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Explain why orthophosphorus acid, H3 PO3...

Explain why orthophosphorus acid, `H_3 PO_3` is diprotic .

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It is diprotic acid because it has only two-OH groups and therefore, give only two ionisable `H^+` ions in aqueous solution.
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BETTER CHOICE PUBLICATION-THE P-BLOCK ELEMENTS-QUESTION BANK
  1. Draw the structure of P4O10.

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  2. What happens when white phosphorus is heated with concentrated NaOH so...

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  3. Explain why orthophosphorus acid, H3 PO3 is diprotic .

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  4. How do you account for the reducing behaviour of H3P02 on the basis of...

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  5. Why the basicity of all the acids of phosphorus is different?

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  6. Give the structure and basicity of H3PO4.

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  7. All the five bonds in PCl5 are not equivalent justify.

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  8. Draw the structure of PCl3.

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  9. Why are pentahalides more covalent than trihalides ?

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  10. Why does NO2 dimerise ?

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  11. Write two reactions of HNO3 with non-metals to show the oxidising char...

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  12. Explain the acidic character of Perchloric acid compared to sulphuric ...

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  13. Why white phosphorus is more reactive than red phosphorus?

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  14. What happens when ammonium nitrate is heated ?

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  15. What is laughing gas ?

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  16. Account for the following: The +2 oxidation state of lead is more stab...

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  17. Inert pair effect strongly exists in heavy p-block elements. Comment.

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  18. Why does R3 P=O exist but R3 N =O does not (R-alkyl group) ?

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  19. write the chemical equatikons when Ammonia reacts with aqueous FeCl3.

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  20. Write the chemical equations when Ammonia reacts with aqueous AlCl3.

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