Explain the following complexes with respect to structural shapes of units, magnetic behaviour and hybrid orbitals involved in the units :
`[Cr(NH_3)_6]^(3+)` , `[Cr(NH_3)_6]^(3+)` , `[Ni(CO)_4]`

Explanation

`{:("Complexes","Magnetic behavior","Hybridisation"," Shape"),(("i")[Co(NH_(3))_(6)]^(3+),"diamagnetic",d^(2)sp^(3),"octahedral"),((ii)[Cr(NH_(3))_(6)]^(3+),"paramagnetic",d^(2)sp^(3),"octahederal"),((iii)[Ni(CO)_(4)],"diamagnetic",sp^(3),"tetrahedral"):}`