AIIMS 2019 Chemistry Magnetic Properties MCQ Question

The spin magnetic moment of 1.73 BM indicates the presence of one unpaired electron, which corresponds to a d³ configuration, typical for vanadium in the +4 oxidation state (V⁴⁺). Thus, VCl₄, with vanadium in the +4 state, is the only compound that fits this description. In contrast, VCl₂ (V²⁺) would have three unpaired electrons, VCl₃ (V³⁺) would have two unpaired electrons, and VCl₅ (V⁵⁺) would have no unpaired electrons, all resulting in different magnetic moments.