An oxidation state of Cr in K2Cr2O7
...An oxidation state of Cr in K2Cr2O7
7
6
5
4
Correct answer is B
The oxidation state of K2Cr2O7 is +6. option A,C,D are the oxidation state of other elements like O7,C14, etc.
+2+2x+(−2×7)=0
2x=12
x=+6
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