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  4. In the reaction of oxalate with permanganate in acidic medium, the number of electrons involved in producing one molecule of CO2 is :

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Q. In the reaction of oxalate with permanganate in acidic medium, the number of electrons involved in producing one molecule of $CO_2$ is :

JEE MainJEE Main 2019Redox Reactions

Solution:

$2 \overset{\text{+ 7}}{M } nO_4 + 5C_2 O^{2-}_4 + 16H^{+} \rightarrow 2 \overset{\text{+ 2 }}{M } n^{2+} +10 CO_{2} + 8H_2 O $
$10 \; e^{-}$ trans for $10$ molecules of $CO_2$ so per molecule of $CO_2$ transfer of $e^{-}$ is $'1'$