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H(3)PO(3) acts as a reducing agent while...

`H_(3)PO_(3)` acts as a reducing agent while `H_(3)PO_(4)` does not-Explain. Mention the basicities ol these two acids.

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Orthophosphorus acid `[H_(3)PO_(3)` or `O=PH(OH)_(2)]` acts as a reducing agent due to the presence of a P - H bond. But. orthophosphoric acid `[H_(3)PO_(4)` or `O=P(OH_(3)l` containing no P - H bond does not act as a reducing agent.
The basicity of `H_(3)PO_(3)` containing nvo ionisable -OH groups is two (a dibasic acid) while that of `H_(3)PO_(4)` c.ontaining three ionisable -OH groups is three (a tribasic acid).
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CHHAYA PUBLICATION-P-BLOCK ELEMENTS-SHORT ANSWER TYPE (SA)
  1. N and Bi do not form pentachlorides but P does- why?

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  2. PCl(5) exists as the ion-pair PBr(5) exists as the ion pair -explain.

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  3. H(3)PO(3) acts as a reducing agent while H(3)PO(4) does not-Explain. M...

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  4. In organic reactions PCl(5) acts as a chlorinating agent. Explain.

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  5. NH(3) is a better complexing agent than PH(3) - why?

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  6. Which among and has higher value of bond angle and why?

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  7. How many types of salts are obtained when H(3)PO(4) reacts with NaOH?

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  8. Liquor ammonia bottles are to be opened only after cooling- why?

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  9. Why does a hot Pt-wire becomes brighter when NH(3) gas is passed over ...

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  10. Mention an observation which supports that +5 oxidation state of Bi is...

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  11. NCl(3) is an endothermic compound while NF(3) is an exothermic compou...

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  12. The electron gain enthalpy with negative sign is less for oxygen for ...

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  13. H(2)S is acidic but H(2)O ls neutraJ in nature-why?

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  14. Sulphur is paramagnetic in the vapour state-why?

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  15. SF(6) exists but SH(6) has no existence-why?

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  16. Explain why sulphuric acid has a high boiling point. How do chemists m...

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  17. The bleaching action of SO(2) is temporary but that of Cl(2) is perman...

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  18. Arrange the hydrides of the elements of group-16 in the order of incre...

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  19. Why is the bond angle in H(2)S less than that in H(2)O?

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  20. Conc. H(2)SO(4) cannot be used for drying HBr/HI-why?

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