The oxidation number of phosphorus in ${\rm{PO}}_4^{3 - },{{\rm{P}}_4}{{\rm{O}}_{10}}{\rm{and}}{{\rm{P}}_2}{\rm{O}}_7^{4 - }$ is :

JEE CHEMISTRY MCQ: REDOX REACTIONS

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Application +4 | -1

The oxidation number of phosphorus in

\mathrm{PO}_4^{3 - },{\mathrm{P}_4}{\mathrm{O}_{10}}\mathrm{and}{\mathrm{P}_2}\mathrm{O}_7^{4 - }

is :

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Correct option: D

+ 5

Option D (+5) is correct because the oxidation number of phosphorus in all the given compounds is +5.

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\mathrm{H}

2 \mathrm{KClO}_3 \longrightarrow 2 \mathrm{KCl}+3 \mathrm{O}_2

\mathrm{HNO}_3

\mathrm{HNO}_3

\mathrm{MnO}_4^{-}(\mathrm{aq})+\mathrm{Br}^{-}(\mathrm{aq})+\mathrm{H}_2 \mathrm{O} \longrightarrow 2 \mathrm{MnO}_2(\mathrm{aq})+\mathrm{BrO}_3^{-}(\mathrm{aq})+2 \mathrm{OH}^{-}(\mathrm{aq})

\mathrm{Br}

-1

+5.