Coordination Compounds

In the coordination compound, K4[Ni(CN)4], the oxidation state of nickel is

  1. 0
  2. –1
  3. +1
  4. +2

Answer

Let the oxidation number of Ni in K4[Ni(CN)4] = x

1 × 4 + x × (–1) × 4 = 0

4 + x – 4 = 0

x = 0

The correct option is A.