Is[Ni(NH3)6]SO4 paramagnetic or diamagnetic??Is it inner orbital complex or outer one????Pls explain with electronic confg.

In this complex ion Ni2+ (3d8) shows the hybridization sp3d2(though NH3 is a strong field ligand d8 configuration never shows octahedral inner orbital complex) .One outer 4s, 3 outer 4p & 2 outer 4d hybridize to form 6 equivalent sp3d2 . So it is a outer orbital complex. As 3d8 configuration of Ni2+ ion remains after complexation it has 2 unpaired electrons in 3d orbital.So it shows paramagnetic property.