Identify cationic complex from following.

Identify cationic complex from following.
  1. Trioxalatocobaltate (III) ion
  2. Triamminetrinitrocobalt (III)
  3. Pentaamminechlorocobalt (II) sulphate
  4. Tetracyanonickelate (II) sulphate

Solution

Trioxalatocobaltate III ion $\left[\mathrm{Co}(\mathrm{OX})_3\right]^{-3}$ Triamminetrinitrocobalt (III) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3\left(\mathrm{NO}_2\right)_3\right]$ Pentaamininechlorocobalt (II) sulphate $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right] \mathrm{SO}_4$ Tetra cyanonickelate (II) sulphate $\mathrm{K}_2\left[\mathrm{Ni}(\mathrm{CN})_4\right]$

Asked in: MHT CET 2022 (11 Aug Shift 1)

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