Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test General Science Chemistry Chemical Reaction
The oxidation number of Fe in [Fe(CN)6]3-, [Fe(CN)6]4-, [Fe(SCN)]2+ and [Fe(H2O)6]3+ respectively would be:
1
+3, +2, +3 and +3
2
+3, +3, +3 and +3
3
+2, +2, +2 and +2
4
More than one of the above
5
None of the above