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Calculate the oxidaiton number of underl...

Calculate the oxidaiton number of underlined atoms of the fopllowing : `K_(2)underline (Cr)O_(4)`

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`K_(2)underline(Cr)O_(4)`.
`2(1)+x+4(-2)=0`
` 2+x-8=0`
`x-6 =0`
`x=+6`.
Oxidation number of Cr in `K_(2) CrO_(4)` is `+6`.
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