JEE Main 2022 · 27 Jun · Shift 1 · Chemistry Q71

ChemistrySingle correct+4 / -1Question 71 of 90

Which of the following will have maximum stabilization due to crystal field ?

\mathrm{[Ti(H_2O)_6]^{3+}}

\mathrm{[Co(H_2O)_6]^{2+}}

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

\mathrm{[Cu(NH_3)_4]^{2+}}

Answer and worked solution

Official answer: C

Largest CFSE. $\mathrm{[Co(CN)_6]^{3-}}$ is low-spin $d^6$ ( $t_{2g}^6$ , $-2.4\Delta_o$ ) with the strong-field cyanide ligand and a +3 metal.

(C)

Topics:Crystal field theory

JEE Main 2022 · 27 Jun · Shift 1, Chemistry question 71