The oxidation state of cr in cro5 is


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What is the oxidation number of Cr In CrO5? Why?

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If we want to find out Oxidation no. of Cr in CrO5 by general method it would be +10  which is wrong   as in its real structure one Cr atom is attached  to to 4 oxygen atoms & double-bonded with two O-atoms & single bonded with the rest two O-atoms .Oxygen being more electronegative attracts the shared electron towards itself. The double-bonded O-atoms retains 4 electrons while the single-bonded retains 2  that case one Cr-atom loses 6 electrons & it retains a charge of positive 6+

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