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प्रश्न
In the complexes `[Fe(CN)_6]^(3-)` and `[pt(en) (H_2O)_2(NO_2 (Cl)^(2+)]``the respective oxidation numbers of central metal atoms are
1) +3 and +4
2) +6 and + 4
3) +6 and +3
4) +3 and + 3
उत्तर
+3 and +4
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