Q.
In K3Cr(C2O4)3 the coordination number and oxidation state of Cr are respectively
2660
227
Rajasthan PETRajasthan PET 2006
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Solution:
In K3Cr(C2O4)3, chromium (Or) is attached by three divalent oxalate ligand hence the coordination number of Cr is 6. Let the oxidation state of Cr is x in K3Cr(C2O4)3 +3+x+3(−2)=0 3+x−6=0 x−3=0 x=+3