Question

Geometrical shapes of the complexes formed by the reaction of Ni²⁺, with Cl, CN, and H₂O respectively are

1) octahedral, tetrahedral and square planar 

2) tetrahedral, square planar and octahedral 

3) square planar, tetrahedral and octahedral 

4) octahedral, square planar and octahedral

Answer 1

2) tetrahedral, square planar and octahedral 

Reaction of Ni²⁺ with CN^- forms [Ni(CN)₄]^2- complex having dsp² hybridisation (shape square planar) 

Reaction of Ni²⁺ with Cl- forms [NiCl₄]^2- complex having sp³ hybridsation (shape tetrahedral) 

Reaction of Ni²⁺ with H₂O forms [Ni(H₂O)₆]²⁺ complex having octahedral shape.