Match List-I with List-II List I (Species) List II (Electronic distribution) A. ${\mathrm{Cr}}^{+2}$ i. $3{d}^{8}$ B. ${\mathrm{Mn}}^{+}$ ii. $3{d}^{3}4{s}^{1}$ C. ${\mathrm{Ni}}^{+2}$ iii. .$3{d}^{4}$ D. ${V}^{+}$ iv. $3{d}^{5}4{s}^{1}$ Choose the correct answer from the options given below:

JEE Main 2024 — Chemistry Inorganic Chemistry

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Match List-I with List-II

	List I (Species)		List II (Electronic distribution)
A.	${\mathrm{Cr}}^{+2}$	i.	$3{d}^{8}$
B.	${\mathrm{Mn}}^{+}$	ii.	$3{d}^{3}4{s}^{1}$
C.	${\mathrm{Ni}}^{+2}$	iii.	. $3{d}^{4}$
D.	${V}^{+}$	iv.	$3{d}^{5}4{s}^{1}$

Choose the correct answer from the options given below:

Official previous-year question

Held on 30 Jan 2024 · Verified 6 Jul 2026.

Options

A
(A)-I, (B)-II, (C)-III, (D)-IV
B
(A)-III, (B) - IV, (C) - I, (D)-II
C
(A)-IV, (B)-III, (C)-I, (D)-II
D
(A)-II, (B)-I, (C)-IV, (D)-III

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Solution

Electrons must be removed from the outermost orbital to form an ion.

The electronic configurations of the elements are as follows,

$\mathrm{Cr}24\rightarrow [\mathrm{Ar}]3{d}^{5}4{s}^{1};{\mathrm{Cr}}^{2+}\rightarrow [\mathrm{Ar}]3{d}^{4}$

$\mathrm{Mn}25\rightarrow [\mathrm{Ar}]3{d}^{5}4{s}^{2};{\mathrm{Mn}}^{+}\rightarrow [\mathrm{Ar}]3{d}^{5}4{s}^{1}$

$\mathrm{Ni}28\rightarrow [\mathrm{Ar}]3{d}^{8}4{s}^{2};{\mathrm{Ni}}^{2+}\rightarrow [\mathrm{Ar}]3{d}^{8}$

$23V\rightarrow [\mathrm{Ar}]3{d}^{3}4{s}^{2};{V}^{+}\rightarrow [\mathrm{Ar}]3{d}^{3}4{s}^{1}$

Hence option B is the answer.

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Solution

Electrons must be removed from the outermost orbital to form an ion.

The electronic configurations of the elements are as follows,

$\mathrm{Cr}24\rightarrow [\mathrm{Ar}]3{d}^{5}4{s}^{1};{\mathrm{Cr}}^{2+}\rightarrow [\mathrm{Ar}]3{d}^{4}$

$\mathrm{Mn}25\rightarrow [\mathrm{Ar}]3{d}^{5}4{s}^{2};{\mathrm{Mn}}^{+}\rightarrow [\mathrm{Ar}]3{d}^{5}4{s}^{1}$

$\mathrm{Ni}28\rightarrow [\mathrm{Ar}]3{d}^{8}4{s}^{2};{\mathrm{Ni}}^{2+}\rightarrow [\mathrm{Ar}]3{d}^{8}$

$23V\rightarrow [\mathrm{Ar}]3{d}^{3}4{s}^{2};{V}^{+}\rightarrow [\mathrm{Ar}]3{d}^{3}4{s}^{1}$

Hence option B is the answer.

JEE Main 2024 — Chemistry Inorganic Chemistry

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