Chemistry - Coordination Chemistry Question with Solution | TestHub

CN⁻ is a strong field ligand, so Ni²⁺ undergoes dsp² hybridisation forming square planar geometry. In this geometry all electrons are paired due to strong ligand field, so the complex is diamagnetic. Square planar complexes generally do not involve unpaired electrons in d-orbitals, and the structure is planar, hence optically inactive. Geometrical isomerism is not applicable in the given arrangement.