Exhibits temperature dependent magnetic behaviour (paramagnetic/diamagnetic) the coordination geometries of Ni2+ in the paramagnetic and diamagnetic states are respectively
A.tetrahedral and tetrahedral
B.square planar and square planar
C.tetrahedral and square planar✓ Correct
D.square planar and tetrahedral
Explanation
The low spin complex at the high temperature dsp2 which is a square planar complex and diamagnetic. The high spin complex at the low temperature sp3 which is tetrahedral complex and paramagnetic. Hence, the correct answer is option (c)