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Can PCl5 act as an oxidising as well as ...

Can `PCl_5` act as an oxidising as well as a reducing agent ? Justify.

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Phosphorus has maximum oxidation state of +5 in `PCl_5`. It cannot increase its oxidation state further and therefore, `PCI_5`, cannot act as a reducing agent. However, it can decrease its oxidation number from +5 to +3 or some lower value, therefore, `PCl_5` acts as an oxidising agent. For example, it oxidises Ag to AgCl, Sn to `SnCl_4` and `H_2` to HCl.
`overset(0)(2Ag) + overset(+5)(PCl_5) to overset(+1)(2AgCl) + overset(+3)(PCl_3)`
`overset(0)(Sn) + overset(+5)(2PCl_5) to overset(+4) (SnCl_4) + overset(+3)(2PCl_3)`
`overset(+5)(PCl_5) + overset(0)(H_2) to overset(+3)(PCl_3) + overset(+1)(2HCl)`
In these reactions, oxidation number of P decreases from +5 in `PCl_5` to +3 in `PCl_3` and that of Ag and H increases from 0 to +1 and that of Sn from 0 to +4. Thus, `PCl_5` acts as an oxidising agent.
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U-LIKE SERIES-THE P-BLOCK ELEMENTS -NCERT TEXTBOOK EXERCISES
  1. Why does nitrogen show catenation properties less than phosphorus ?

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  2. Give the disproportionation reaction of H3PO3.

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

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

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

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  6. Knowing the electron gain enthalpy values for O to O^(-) and O to O^(2...

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  7. Which aerosols deplete ozone ?

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  8. Describe the manufacture of H2SO4 by contact process

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  9. How is SO2 an air pollutant ?

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  10. Why are halogens strong oxidising agents ?

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

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  12. Explain why inspite of nearly the same electronegativity, oxygen forms...

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  13. Write two uses of ClO2 .

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  14. Why are halogens coloured ?

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  15. Write the reactions of F2 and Cl2 with water.

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  16. How can you prepare Cl2 from HCl and HCl from Cl2 ? Write reactions ...

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

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  18. What are the oxidation states of phosphorous in the following : (i) ...

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  19. Write balanced equations for the following : NaCl is heated with sul...

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  20. Write balanced equations for the following : Chlorine gas is passed ...

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