Cr2O7 + 6Fe2+ + 14H+ → 2Cr3+ +6Fe3+ + 7H2O. In the above , the…

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Chemistry JAMB 1990

Cr2O7 + 6Fe2+ + 14H+ → 2Cr3+ +6Fe3+ + 7H2O. In the above , the oxidation number of chromium changed from?

  • +7 to +3 checkmark
  • +6 to +3
  • +5 to +3
  • -2 to +3

The correct answer is: A

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