Arrange the following coordination… - JEE Main 2022 Chemistry PYQ | PrepForBharat

JEE Main 2022 — Chemistry Inorganic Chemistry

2022mcqhard

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

A. ${[{\mathrm{FeF}}_{6}]}^{3-}$

B. ${[\mathrm{Fe}{(\mathrm{CN})}_{6}]}^{3-}$

C. ${[{\mathrm{MnCl}}_{6}]}^{3-}$ (high spin)

D. ${[\mathrm{Mn}{(\mathrm{CN})}_{6}]}^{3-}$

Choose the correct answer from the options given below

Official previous-year question

Held on 27 Jun 2022 · Verified 6 Jul 2026.

Options

A
$A<B<D<C$
B
$B<D<C<A$
C
$A<C<D<B$
D
$B<D<A<C$

Did you get this right?

Sign in to track your attempts and accuracy.

Solution

Magnetic moment is directly proportional to the number of unpaired in the central metal atom of a complex.

It is calculated by the formula, $\mu =\sqrt{n(n+2)}\mathrm{BM}$

(A) ${[{\mathrm{FeF}}_{6}]}^{3-}$

${\mathrm{Fe}}^{+3}\rightarrow 3{d}^{5}4{s}^{0}$

$n=5$

(B) ${[\mathrm{Fe}{(\mathrm{CN})}_{6}]}^{3-}$

JEE Main 2022 Chemistry, Coordination Compounds — solution figure 1

${\mathrm{Fe}}^{+3}\rightarrow 3{d}^{5}4{s}^{0}$

$n=1$

(C) ${[{\mathrm{MnCl}}_{6}]}^{3-}$

JEE Main 2022 Chemistry, Coordination Compounds — solution figure 2

${\mathrm{Mn}}^{+3}\rightarrow 3{d}^{4}4{s}^{0}$

$n=4$

(D) ${[\mathrm{Mn}{(\mathrm{CN})}_{6}]}^{3-}$

JEE Main 2022 Chemistry, Coordination Compounds — solution figure 3

${\mathrm{Mn}}^{+3}\rightarrow 3{d}^{4}4{s}^{0}$

$n=2$

$\mathrm{Hence},\mathrm{correct}\mathrm{order}\mathrm{of}\mathrm{magnetic}\mathrm{moment}\mathrm{is}A>C>D>B$

Your note

Sign in to keep a private note on this question. Nothing you write is ever public.

JEE Main Inorganic Chemistry in other years

Inorganic Chemistry 2026 Inorganic Chemistry 2025 Inorganic Chemistry 2024 Inorganic Chemistry 2023 Inorganic Chemistry 2021 Inorganic Chemistry 2020 Inorganic Chemistry 2019 Inorganic Chemistry 2018 Inorganic Chemistry 2017 Inorganic Chemistry 2016 Inorganic Chemistry 2015 Inorganic Chemistry 2014

More JEE Main Inorganic Chemistry questions

It is noticed that $\mathrm{Pb}^{2+}$ is more stable than $\mathrm{Pb}^{4+}$ but $\mathrm{Sn}^{2+}$ is less stable than $\mathrm{Sn}^{4+}$. Observe the following reactions. $\mathrm{PbO}_{2}+\mathrm{Pb} \rightarrow 2 \mathrm{PbO} ; \Delta_{\mathrm{r}} \mathrm{G}^{\circ}(1)$ $\mathrm{SnO}_{2}+\mathrm{Sn} \rightarrow 2 \mathrm{SnO} ; \Delta_{\mathrm{r}} \mathrm{G}^{\circ}(2)$ Identify the correct set from the following

An excess of AgNO$_3$ is added to $100$ mL of a $0.05$ M solution of tetraaquadichloridochromium (III) chloride. The number of moles of AgCl precipitated will be __________ $\times 10^{-3}$. (Nearest integer)

Which of the following elements has the highest electronegativity?

First and second ionization enthalpies of lithium are $520$ kJ mol$^{-1}$ and $7297$ kJ mol$^{-1}$ respectively. Energy required to convert $3.5$ mg lithium (g) into $\text{Li}^{2+}$(g) $[\text{Li(g)} \rightarrow \text{Li}^{2+}\text{(g)}]$ is _______ kJ mol$^{-1}$. (nearest integer) [Molar mass of Li $= 7$ g mol$^{-1}$]

Identify the molecule $(X)$ with maximum number of lone pairs of electrons (obtained using Lewis dot structure) among $\mathrm{HNO}_{3}, \mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{NF}_{3}$ and $\mathrm{O}_{3}$. Choose the correct bond angle made by the central atom of the molecule $(\mathrm{X})$.

View all Inorganic Chemistry questions

Other Chemistry topics for JEE Main

Physical Chemistry

1826 questions

Organic Chemistry

1783 questions

Keep practicing Inorganic Chemistry

Work through every JEE Main Inorganic Chemistry PYQ, year by year.

Browse all Chemistry topics