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Galena overset("roasting") to etal oxide...

Galena `overset("roasting") to` etal oxide + gas oxidation state of 's' in galena - oxidation state of product

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The correct Answer is:
6
`2pbs_(("Galena"))+3O_(2) to 2pbo+SO_(2)`
Oxidation state of .s. in Galena is -2 Oxidation stateo of in producti=4
Difference in the oxidation states `=-4-(-2)=6`
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