MCQ
Indicate the complex/complex ion which did not show any geometrical isomerism :
- A$\left[\mathrm{CoCl}_{2}(\mathrm{en})_{2}\right]$
- ✓$\left[\mathrm{Co}(\mathrm{CN})_{5}(\mathrm{NC})\right]^{3-}$
- C$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{NO}_{2}\right)_{3}\right]$
- D$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right]^{+}$
