The correct combination is :
Held on 15 Apr 2018 · Verified 6 Jul 2026.
[NiCl4]2− - square-planar; [Ni(CN)4]2− - paramagnetic
[Ni(CN)4]2−-tetrahedral; [Ni(CO)4] - paramagnetic
[NiCl4]2−- paramagnetic; [Ni(CO)4] - tetrahedral
[NiCl4]2−- dimagnetic; [Ni(CO)4] -square-planar
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