Cr2O7 6Fe2 14H 2Cr3 6Fe3 7H2O In the above the ... - JAMB Chemistry 1990 Question
Cr2O7 + 6Fe2+ + 14H+ → 2Cr3+ +6Fe3+ + 7H2O. In the above , the oxidation number of chromium changed from?
A
+7 to +3
B
+6 to +3
C
+5 to +3
D
-2 to +3
correct option: a
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