The oxidation state of manganese in - K-2MnO-4- is- -5- -6- -4- -7-

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Standard XII

Chemistry

Valency and Oxidation State

The oxidation...

Question

The oxidation state of manganese in $K_{2} M n O_{4}$ is:

+ 5

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+ 6

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+ 4

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+ 7

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Solution

The correct option is B $+ 6$
Potassium oxidation number is $+ 1$ , Oxygen oxidation number is $- 2$ .
For $K_{2} M n O_{4}$ :
$2 (+ 1) +$ oxidation number of $M n + 4 (- 2) = 0$
$2 +$ Oxidation number of $M n - 8 = 0$
Oxidation number of $M n = + 6$ .
So answer is B.

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The oxidation state of manganese in K2MnO4 is:

The correct option is B +6Potassium oxidation number is +1, Oxygen oxidation number is −2.For K2MnO4:2(+1)+oxidation number of Mn+4(−2)=02+Oxidation number of Mn−8=0Oxidation number of Mn=+6.So answer is B.

The oxidation state of manganese in $K_{2} M n O_{4}$ is:

The correct option is B $+ 6$
Potassium oxidation number is $+ 1$ , Oxygen oxidation number is $- 2$ .
For $K_{2} M n O_{4}$ :
$2 (+ 1) +$ oxidation number of $M n + 4 (- 2) = 0$
$2 +$ Oxidation number of $M n - 8 = 0$
Oxidation number of $M n = + 6$ .
So answer is B.