In Titration and oxalic medium |ElectrochemistryJEEMain2022

JEE MAIN 2022

27-07-2022 S1

Question

In the titration of $\mathrm{KMnO}_4$ and oxalic acid in acidic medium, the change in oxidation number of carbon at the end point is _____

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Solution

Oxidation state of carbon changes from +3 to +4 . $$ 2 \mathrm{KMnO}_4+5 \mathrm{H}_2 \mathrm{C}_2 \mathrm{O}_4+3 \mathrm{H}_2 \mathrm{SO}_4(\text { dil. }) \rightarrow \mathrm{K}_2 \mathrm{SO}_4+2 \mathrm{MnSO}_4+10 \mathrm{CO}_2+8 \mathrm{H}_2 \mathrm{O} $$

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JEE Main

Chemistry

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