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K2{Cr(CN)2(O)2(O2)NH3}= k^+2 +{Cr(CN)2(O)2(O2)NH3}^-2
Now oxidation no of
CN(cyano)=-1
O(oxo)=-2
O2(peroxo)=-2
Crcromate)=x
CALCULATING OXIDATION NO OF NEGATIVE PART
x +2(-1)+2(-2)+(-2)=-2
X=2+4+2–2=+6
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