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  4. The oxidation number of Cr in CrO5 which has the following structure is

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Q. The oxidation number of $Cr$ in $CrO_5$ which has the following structure isChemistry Question Image

Redox Reactions

Solution:

It has four $O$ atoms as peroxide with oxidation number $= -1$ and one $O$ atom with oxidation number $= - 2$.
Hence, $x + 4(-1) + 1(-2) = 0$ or $x = +6$