NEET UG CHEMISTRY MCQ: REDOX REACTIONS

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Analyzing +4 | -1

Which reaction involves neither oxidation nor reduction?

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Correct option: A

\mathrm{CrO}_4^{2 - } \to \mathrm{C}{\mathrm{r}_2}\mathrm{O}_7^{2 - }

Option A (CrO4^2- → Cr2O7^2-) is correct because the oxidation state of Cr remains +6 in both ions.

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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}^ + }