Q. Number of stereoisomers possible for the octahedral complexes $\left[ Co \left( NH _{3}\right)_{3} Cl _{3}\right]$ and $\left[ Ni ( en )_{2} Cl _{2}\right]$, respectively, are: $[$ [en $=1,2$-ethylenediamine]
KVPYKVPY 2020
Solution: