QAIPM-2002-Ch-2795: NEET 2002 Chemistry - Class 12 AIPM-2002-Ch-2795 Solution: The hypothetical complex chloro diaquatriammine cobalt(III)…

The hypothetical complex "chloro diaquatriammine cobalt(III) chloride" can be broken down as follows : "chloro" indicates the presence of a chloride ion (Cl_) as a ligand. "diaqua" indicates the presence of two water molecules (H_O) as ligands. "triammine" indicates the presence of three ammonia molecules (NH_) as ligands. "cobalt(III)" indicates that cobalt is in the +3 oxidation state. The additional "chloride" at the end suggests the presence of chloride ions outside the coordination sphere, likely as counterions. Given this, let's analyze the options : Option A - [CoCl(NH_)_(H_O)_]Cl_ : This matches the description. It has one chloro ligand, three ammonia ligands, two water ligands, and two chloride ions as counterions, with cobalt in the +3 oxidation state. Option B - [Co(NH_)_(H_O)Cl_] : Incorrect, as it suggests three chloride ligands inside the coordination sphere, which is not specified in the name. Option C - [Co(NH_)_(H_O)_Cl] : Incorrect, as NH_ is not the same as NH_ (ammonia), and it also suggests a different ligand arrangement. Option D - [Co(NH_)_(H_O)_]Cl_ : Incorrect, as it has three water molecules instead of two and lacks the chloro ligand inside the coordination sphere. Therefore, the correct representation is Option A - [CoCl(NH_)_(H_O)_]Cl_ .