Which coordination complex from following contains neutral ligand?

Which coordination complex from following contains neutral ligand?
  1. Pentacarbonyl iron $(0)$
  2. Trioxalatocobaltate(III) ion
  3. Sodium hexanitrocobaltate(III)
  4. Tetracyanonickelate(II) ion

Solution

In the complex 'Pentacarbonyl iron( 0 )', the term carbonyl indicates carbon monoxide (CO), which is a neutral ligand.

Asked in: MHT CET 2023 (14 May Shift 2)

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