Consider the following equation; Cr2O7(aq)2- + 14H+(aq) + 6e- → 2Cr3+(aq) + 7H2O(I). The oxidation number of chromium changes from

  • A -2 to + 3
  • B - 2 to + 6
  • C + 6 to + 3
  • D + 7 to + 6

The correct answer is C. + 6 to + 3

No explanation given
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