‹ Back to the paper
Choose the correct option.
In the complexes, [Fe(CN)₆]⁴⁻ and [Pt(en)(H₂O)₂Br(NO₂)]²⁺, the respective oxidation numbers of…
In the complexes, $[\text{Fe}(\text{CN})_6]^{4-}$ and $[\text{Pt}(\text{en})(\text{H}_2\text{O})_2\text{Br}(\text{NO}_2)]^{2+}$, the respective oxidation numbers of central metal atoms are:
- (a)+3 and +4
- (b)+2 and +2
- (c)+2 and +4
- (d)+3 and +2
Answer
Answer
Correct option: (c)
Answer: (c) +2 and +4
In $[\mathrm{Fe(CN)_6}]^{4-}$: $x - 6 = -4$, so $x = +2$. In $[\mathrm{Pt(en)(H_2O)_2Br(NO_2)}]^{2+}$: $x + 0 + 0 - 1 - 1 = +2$, so $x = +4$.