Of the following complex ions, the one that is optically active is (a) cis-[CoCl2(en)21* (b) (CoCl2(NH3)4]* () [CoCl4(NH3)2] (d) [CuCl4] (e) [Ag(NH3)2]* Pt II: Which of these octahedral complexes would you expect to exhibit geometric isomerism? Explain. (a) [Cr(OH)(NH3)5]2 (b) [CrCl2(H20)(NH3)3] (C) (CrCl2(en)2]* (d) (CrCl4(en)] (e) [Cr(en)3]3-