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Question

Potassium peroxochromate K3CrO8 is a red-brown paramagnetic solid prepared from the following reaction.
CrO24+H2O2+OH[CrO8]3+H2O+O2
If oxidation state of Cr in product is X, number of peroxide bonded O in product is Y and number of electrons in d orbital of Cr is Z then what is value of X+Y+Z?

A
14.0
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B
14
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C
14.00
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Solution


Since all the oxygens present are peroxide bonded, the
oxidation state of Cr is, (X) = 5.
Total number of peroxide bonded O are, (Y) = 8.
Number of electrons in d orbitals of Cr is, (Z) = 1.
So X+Y+Z=14

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