Chemistry - Coordination Chemistry Question with Solution | TestHub

(A) trans- ${\left[\mathrm{Co}(\mathrm{en}{)}_2{\mathrm{Cl}}_2\right]}^{+}$

⇒ (A) is trans form and shows plane of symmetry which is optically inactive (not optically active)

(B) cis- ${\left[\mathrm{Co}(\mathrm{en}{)}_2{\mathrm{Cl}}_2\right]}^{+}$

$\Rightarrow (\mathrm{B})$ is cis form and does not shows plane of symmetry, hence it is optically active.