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Redox Reactions

Section: Chemistry
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Question : 55 of 70
 
Marks: +1, -0
The oxidation states of transition metal atoms in K2Cr2O7,KMnO4 and K2FeO4, respectively, are x,y and z. The sum of x,yand z is _____.
[2 Sep 2020 Shift 2]
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