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[" 3) In the complex ion "[Cr(C(2)O(4))(...

[" 3) In the complex ion "[Cr(C_(2)O_(4))_(2)(H_(2)O)_(2)]-],[" the oxidation number of "Cr" is- "],[[" 1) "+1,2" ) "+2,-1=x+(-2)],[" 0"" 3) "+3," 4) "-2,-1]]

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