The spin-only magnetic moment value of an octahedral complex among CoCl 3 · 4 NH 3 , NiCl 2 · 6 H 2 O and PtCl 4 · 2 HCl , which upon reaction with excess of AgNO 3 gives 2 moles of AgCl is_____B.M. (Nearest Integer)

Step-by-step solution

(I) H 2 PtCl 6 → no ppt with AgNO 3 Pt + 4 ,   CN = 6 (II) Ni H 2 O 6 Cl 2   AgNO 3 excess   2 mole of AgCl ↓ , Ni + 2 , CN = 6 , n = 2 ,   μ m = n n + 2   BM = 8 = 2 . 82 BM ≃ 3 Aqua complexes, generally have CN = 6 (III) CoCl 2 NH 3 4 Cl ⟶ AgNO 3 excess 1 Mole of AgCl ↓ , Co + 3 , CN = 6