Which of the following compound show optical isomerism?

CHEMISTRY · Single correct · CBSE · Chemistry · Coordination Compounds · Coordination Compounds

Problem

Which of the following compound show optical isomerism? (1) *cis* -

[\text{CrCl}_3(\text{NH}_3)_3]

(2) *cis* -

[\text{Co}(\text{NH}_3)_4\text{Cl}_2]^+

(3)

[\text{Co}(\text{en})_3]^{3+}

(4) *trans* -

[\text{Co}(\text{en})_2\text{Cl}_2]^+