In the coordination compound [Co NH3 4Cl2]+, there are two possible geometric isomers: cis and trans.1. Cis isomer: The two Cl ligands are adjacent to each other on the octahedral complex, with the four NH3 ligands occupying the remaining positions.2. Trans isomer: The two Cl ligands are opposite each other on the octahedral complex, with the four NH3 ligands occupying the remaining positions.So, there are 2 geometric isomers possible for the coordination compound [Co NH3 4Cl2]+.