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Give the disproportionation reaction of `H_3PO_3`.

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On heating, orthophosphorus acid `(H_(3)PO_(3))` disproportionates to give orthophosphoric acid `(H_(3)PO_(4))` and phosphine `(PH_(3))`. The oxidation states of P in various species involved in the reaction are mentioned below.
`4H_(3) overset(+3)(PO_(3)) to 3H_(3)overset(+5)(PO_(4))+ overset(-3)(PH_(3))`
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NCERT-THE P-BLOCK ELEMENTS-EXERCISE
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  2. Why does nitrogen show catenation properties less than phosphorus.

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  3. Give the disproportionation reaction of H3PO3.

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

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

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

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  7. Knowing the electron gain enthalpy values for O rarr O^(Ө) and O rarr ...

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  8. Which aerosols deplete ozone?

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  9. Describe the manufacture of H(2)SO(4) by contact process?

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  10. How is SO2 an air pollutant?

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  11. Why are halogens strong oxidising agents ?

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

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

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  14. Write two uses of ClO2.

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  15. Why are halogens coloured?

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  16. Write the reactions of F(2) and Cl(2) with water.

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  17. How can you prepare Cl2 from HCl and HCI from Cl2? Write reactions onl...

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  18. What inspired N. Bartlett for carrying out reaction between Xe and PtF...

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  19. What are the oxidation states of phosphorus in the following: (i)H(3...

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  20. Write balanced equation for the following: (i). NaCl is heated with ...

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