Draw the structure of [Co(NH3)6]3+ ion. Also show hybridization in this complex.

Geometry of [Co(NH₃)₆]³⁺ is octahedral. Structure is as follows:
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Oxidation state of Cobalt is +3. Its outer electronic configuration is 3d⁶. 

NH₃ being a strong field ligand causes the pairing. Therefore, Co can undergo d ² sp ³hybridization.