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Valency and Oxidation State

What is the o...

Question

What is the oxidation number of $M n$ in $M n O_{2}$ ?

A

+ 2

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B

+ 4

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C

- 2

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D

- 4

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Solution

The correct option is A $+ 4$
The oxidation number of simple ions is equal to the charge on the ion. The oxidation number of $M n$ in $M n O_{2}$ is $M n^{+} 4$ .
Hence option $B$ .

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