NEET UG CHEMISTRY MCQ: REDOX REACTIONS

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An element if present in the free or the uncombined state, its each atom bears an oxidation number of

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Correct option: D

zero

Option D (zero) is correct because the oxidation number of an element in its free or uncombined state is always zero.

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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}^ + }