AMnO 4- bH 2 O 2- cH - dMn -2- eO 2- fH 2 O is a balanced chemical equation- The value of a - b - c - d - e and f are-A- None of theseB- 2-1-6-2-3 and 4 respectivelyC- 2-3-6-2-4 and 6 respectivelyD- 2-7-6-2-6 and 10 respectively

The correct option is A None of theseH_2O_2 → O_2+2H^+ +2e^ .....(1) MnO_4^ +8H^++5e^ → Mn^2++4H_2O ....(2) For balancing multiply the equation (1) by 5 and ...

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Byju's Answer

Standard XII

Chemistry

Ion Electron Method

aMnO 4-+ bH 2...

Question

$a M n O_{4}^{-} + b H_{2} O_{2} + c H^{+} \to d M n^{+ 2} + e O_{2} + f H_{2} O$ is a balanced chemical equation. The value of $a, b, c, d, e$ and $f$ are:

2, 1, 6, 2, 3

and

4

respectively

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2, 3, 6, 2, 4

and

6

respectively

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2, 7, 6, 2, 6

and

10

respectively

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None of these

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Solution

The correct option is D None of these
$H_{2} O_{2} \to O_{2} + 2 H^{+} + 2 e^{-} . . . . . (1) M n O_{4}^{-} + 8 H^{+} + 5 e^{-} \to M n^{2 +} + 4 H_{2} O . . . . (2)$
For balancing multiply the equation (1) by $5$ and equation (2) by $2$ . Then add them.
$5 \times [H_{2} O_{2} \to 0_{2} + 2 H^{+} + 2 e^{-}] 2 \times [M n O_{4}^{-} + 8 H^{+} + 5 e^{-} \to M n^{2 +} + 4 H_{2} O]$
____________________________________________
$2 M n O_{4}^{-} + 5 H_{2} O_{2} + 6 H^{+} \to 2 M n^{+ 2} + 5 O_{2} + 8 H_{2} O$

The value of $a, b, c, d, e$ and $f$ are $2, 5, 6, 2, 5, 8$ respectively.

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aMnO−4+bH2O2+cH+→dMn+2+eO2+fH2O is a balanced chemical equation. The value of a,b,c,d,e and f are:

$a M n O_{4}^{-} + b H_{2} O_{2} + c H^{+} \to d M n^{+ 2} + e O_{2} + f H_{2} O$ is a balanced chemical equation. The value of $a, b, c, d, e$ and $f$ are: