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JEE Main 20246 AprilEvening Shift
Exam
JEE Main
Year
2024
Date
6 April
Shift
Evening Shift
Subject
Chemistry
Chapter
d and f Block Elements

JEE Main 2024 · 6 April · Evening Shift · Chemistry · d and f Block Elements

Arrange the following elements in the increasing order of number of...

Arrange the following elements in the increasing order of number of unpaired electrons in it. (A) (Sc\mathrm{Sc}) (B) (Cr\mathrm{Cr}) (C) (V\mathrm{V}) (D) (Ti\mathrm{Ti}) (E) Mn Choose the correct answer from the options given below :

Options

  1. A((\mathrm{A}) < (\mathrm{D}) < (\mathrm{C}) < (\mathrm{B}) < (\mathrm{E}))
  2. B((\mathrm{C}) < (\mathrm{E}) < (\mathrm{B}) < (\mathrm{A}) < (\mathrm{D}))
  3. C((\mathrm{A}) < (\mathrm{D}) < (\mathrm{C}) < (\mathrm{E}) < (\mathrm{B}))
  4. D(\text{ (B) } < \text{ (C) } < \text{ (D) } < \text{ (E) } < \text{ (A) })

Correct answer

C. ((\mathrm{A}) < (\mathrm{D}) < (\mathrm{C}) < (\mathrm{E}) < (\mathrm{B}))

Step-by-step solution

Unpaired electronSc⁡[Ar]4 s23 d11Cr[Ar]4 s13 d56V[Ar]4 s23 d33Ti:[Ar]4 s23 d22Mn:[Ar]4 s23 d55\begin{array}{ll} \text{Unpaired electron} \\ \operatorname{Sc}[\mathrm{Ar}] 4 \mathrm{~s}^2 3 \mathrm{~d}^1 & 1 \\ \mathrm{Cr}[\mathrm{Ar}] 4 \mathrm{~s}^1 3 \mathrm{~d}^5 & 6 \\ \mathrm{V}[\mathrm{Ar}] 4 \mathrm{~s}^2 3 \mathrm{~d}^3 & 3 \\ \mathrm{Ti}:[\mathrm{Ar}] 4 \mathrm{~s}^2 3 \mathrm{~d}^2 & 2 \\ \mathrm{Mn}:[\mathrm{Ar}] 4 \mathrm{~s}^2 3 \mathrm{~d}^5 & 5 \end{array}
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