Statement 1: In the complex [Co(NH₃)₃Cl₃], chloride ions satisfy the primary valencies as well as the secondary valencies of cobalt metal.

Statement 2: [Co(NH₃)₃Cl₃] shows geometrical as well as optical isomerism.

detailed solution

Correct option is C

Statement 1: Every element tends to satisfy both its primary and secondary valencies. In order to meet this requirement a negative ion may often show a dual behaviour, i.e. it may satisfy both primary and secondary valencies since in every case the fulfillment of coordination number of the central metal ion appears essential. This dual behaviour is represented by both thick and dotted lines.Statement 2: Complex [Co(NH3Cl3] may show two isomeric forms called fac- and mer-. Facial isomers have three identical ligands on one triangular face whereas meridional isomers have three identical ligands in a plane bisecting the molecule.It does not show optical isomerism because of the presence of plane of symmetry.