When `KMnO_(4)` acts as an oxidising agnet and ultimetely from `MnO_(4)^(2-), MnO_(2), Mn_(2)O_(3)`, and `Mn^(2+)`, then the number of electrons transferred in each case, respectively, areA. ` 1,3,4,5`B. ` 3,5,7,1`C. ` 1,5,3,7`D. ` 4,3,1,5`

When `KMnO_(4)` acts as an oxidising agnet and ultimetely from `MnO_(4

1.	When `KMnO_(4)` acts as an oxidising agnet and ultimetely from `MnO_(4)^(2-), MnO_(2), Mn_(2)O_(3)`, and `Mn^(2+)`, then the number of electrons transferred in each case, respectively, areA. ` 1,3,4,5`B. ` 3,5,7,1`C. ` 1,5,3,7`D. ` 4,3,1,5`
Answer» Correct Answer - A Let x be the oxidaton number of Mn. ` MnO_4^(2-) rArr x + 4 (-2) =-1` ` x-8 =-1` `x = + 7` `MnO_4^(2-) rArr x +4 (-2) =-2` ` x-8= -2` ` x= +6` `MnO_2 rArr x + 2(-2) =0` ` x-4 =0` `x rArr +4` `Mn_2O_3 rArr 2x +3 (-2) =0` ` 2x -6 =0` ` x=+3` `Mn^(2+) rArr x = +2` `:. overset(+7) (M)nO_(4)^(-)+e^(-) rarr overset(+6)(M)nO_(4)^(2-)` `+3e^(-) rarr overset(+4)(M)nO_(2)` `+4e^(-)rarroverset(+3)(M)n_(2)O_(3)` `+5e^(-) rarr overset(+2)(M)n^(2+)`

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When `KMnO_(4)` acts as an oxidising agnet and ultimetely from `MnO_(4)^(2-), MnO_(2), Mn_(2)O_(3)`, and `Mn^(2+)`, then the number of electrons transferred in each case, respectively, areA. ` 1,3,4,5`B. ` 3,5,7,1`C. ` 1,5,3,7`D. ` 4,3,1,5`

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