In the conversion of ${\rm{B}}{{\rm{r}}_2}$ to ${\rm{BrO}}_3^ - $, the oxidation number of Br changes from

NEET UG CHEMISTRY MCQ: REDOX REACTIONS

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Understanding +4 | -1

In the conversion of

\mathrm{B}{\mathrm{r}_2}

\mathrm{BrO}_3^ -

, the oxidation number of Br changes from

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Correct option: A

Zero to + 5

Option A (Zero to + 5) is correct because in Br2, the oxidation state of Br is 0, and in BrO3-, the oxidation state of Br is +5.

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{I_2}

\mathrm{MnO}_4^ - + {\mathrm{C}_2}\mathrm{O}_4^{2 - } + {\mathrm{H}^ + } \to \mathrm{M}{\mathrm{n}^{2 + }} + \mathrm{C}{\mathrm{O}_2} + {\mathrm{H}_2}\mathrm{O}

\mathrm{MnO}_4^ -

{\mathrm{C}_2}\mathrm{O}_4^{2 - }

{\mathrm{H}^ + }