Practice question

Given: What is the magnetic moment (in BM) of [CoCl₄]^{2- ? These values define the system as per NCERT data. Formula: Magnetic moment = sqrt3(3+2) = sqrt15 approx 3.87 BM.. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: Co²⁺ ( d⁷ ) in tetrahedral [CoCl₄]^{2- with weak field Cl^- is high spin ( e⁴ t_2³ ), with 3 unpaired electrons. Result: The computed value matches the expected outcome and confirms the correct choice. Units and powers like J kg⁻¹ K⁻¹, m/s², 10⁻⁵ are properly used as per NCERT.