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Arrange the following elements in the increasing order of number of unpaired electrons in it. (A) Sc (B) Cr (C) V (D) Ti (E) Mn Choose the correct answer from the options given below: (1) (C) < (E) < (B) < (A) < (D) (2) (B) < (C) < (D) < (E) < (A) (3) (A) < (D) < (C) < (B) < (E) (4) (A) < (D) < (C) < (E) < (B)

1. (C) < (E) < (B) < (A) < (D)
2. (B) < (C) < (D) < (E) < (A)
3. (A) < (D) < (C) < (B) < (E)
4. (A) < (D) < (C) < (E) < (B)

Correct answer: (A) < (D) < (C) < (E) < (B)

Solution

The correct option reflects the increasing number of unpaired electrons in the elements based on their electron configurations. Scandium (Sc) has 1 unpaired electron, Titanium (Ti) has 2, Vanadium (V) has 3, Chromium (Cr) has 6 due to its half-filled d subshell, and Manganese (Mn) has 5 unpaired electrons, thus arranging them in the specified order.

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