NEET UG CHEMISTRY MCQ: REDOX REACTIONS

1 Medium

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Application +4 | -1

When

\mathrm{S}{\mathrm{O}_2}

is passed in acidified potassium dichromate solution, the oxidation state of S is changed from :

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Correct option: C

+4 to +6

Option C (+4 to +6) is correct because the oxidation of

\mathrm{SO}_2

\mathrm{SO}_4^{2-}

results in a change in oxidation state from +4 to +6 for sulfur.

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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}^ + }