Which among the following is a cationic complex?

Which among the following is a cationic complex?
  1. $\mathrm{Na}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$
  2. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right] \mathrm{SO}_4$
  3. $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$
  4. $\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]$

Solution

$\mathrm{Na}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$ : Anionic $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right] \mathrm{SO}_4$ : Cationic $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ : Neutral $\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]$ : Anionic

Asked in: MHT CET 2024 (15 May Shift 2)

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