JEE Main 2022 · 25 Jul · Shift 1 · Chemistry Q86

ChemistryInteger+4 / -1Question 86 of 90

Consider the following metal complexes :

$\mathrm{[Co(NH_3)_6]^{3+}}$

$\mathrm{[CoCl(NH_3)_5]^{2+}}$

$\mathrm{[Co(CN)_6]^{3-}}$

$\mathrm{[Co(NH_3)_5(H_2O)]^{3+}}$

The spin-only magnetic moment value of the complex that absorbes light with shortest wavelength is ______ B.M. (Nearest integer)

Your answer

Answer and worked solution

Official answer: 0

Strongest field ligand CN⁻ gives the largest splitting and absorbs the shortest wavelength; $\mathrm{[Co(CN)_6]^{3-}}$ is low-spin $d^6$ , 0 B.M.

Answer: 0

JEE Main 2022 · 25 Jul · Shift 1, Chemistry question 86