JEE Main 2022 · 27 Jun · Shift 2 · Chemistry Q70

ChemistrySingle correct+4 / -1Question 70 of 90

Arrange the following coordination compounds in the increasing order of magnetic moments. (Atomic numbers: Mn = 25; Fe = 26)

A. $\mathrm{[FeF_6]^{3-}}$

B. $\mathrm{[Fe(CN)_6]^{3-}}$

C. $\mathrm{[MnCl_6]^{3-}}$ (high spin)

D. $\mathrm{[Mn(CN)_6]^{3-}}$

Choose the correct answer from the options given below:

A < B < D < C

B < D < C < A

A < C < D < B

B < D < A < C

Answer and worked solution

Official answer: B

Unpaired electrons. $\mathrm{[Fe(CN)_6]^{3-}}$ 1, $\mathrm{[Mn(CN)_6]^{3-}}$ 2, $\mathrm{[MnCl_6]^{3-}}$ 4, $\mathrm{[FeF_6]^{3-}}$ 5.

Order. B < D < C < A.

(B)

Topics:Magnetic properties and colour Crystal field theory

JEE Main 2022 · 27 Jun · Shift 2, Chemistry question 70