The number of oxygen atoms having -2 oxidation state in ${\bf{Cr}}{{\bf{O}}_{\bf{5}}}$ is

JEE CHEMISTRY MCQ: REDOX REACTIONS

1 Easy

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Application +4 | -1

The number of oxygen atoms having -2 oxidation state in

\mathbf{Cr}{\mathbf{O}_\mathbf{5}}

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Correct option: B

Option B (1) is correct because in

CrO_5

, there is one oxygen atom with a -2 oxidation state and four oxygen atoms involved in peroxide linkages.

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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.