The hybridization of nickel in [NiCl₄]2− is:
[NiCl₄]2− (Ni₂+, d8) with weak field Cl− and 4 ligands is tetrahedral, using sp3 hybridization.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Bonding - Valence Bond Theory and Hybridisation
