Q37 / 150 · MHT CET 2025 (19 Apr Shift 2) · Chemistry

What is the total number of donor atoms present in Tetracyanonickelate(II) ion?

  • A
    $2$
  • Correct answer
    B
    $4$
  • C
    $6$
  • D
    $1$

Solution

Tetracyanonickelate(II) ion features nickel(II) as the central metal coordinated with four cyanide ligands.

Each cyanide ligand ($CN^-$) is monodentate, donating through the carbon atom.

With four such ligands, the total number of donor atoms is $4 \times 1 = 4$.

Hence, the correct answer is option: 'B'.

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