Magnetic moment of a divalent ion in aqueous solution of an element with atomic number 25 is:

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CUET Chemistry 10th Aug 2022 Official Paper
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  1. 2.84 BM
  2. 3.87 BM
  3. 4.90 BM
  4. 5.92 BM

Answer (Detailed Solution Below)

Option 4 : 5.92 BM
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Detailed Solution

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Explanation:

The magnetic moment of a divalent ion in an aqueous solution depends on its electronic configuration, which in turn is determined by the element's atomic number.

Atomic number (z = 25) belongs to Mn atom

E.C. of Mn = [Ar]3d54s2

E.C. of Mn2+ ion = [Ar]3d54s0
F4 Vinanti Teaching 10.05.23 D33

\(μ=\sqrt{n(n+2)} B M\)

Number of unpaired electrons = 5

\(μ=\sqrt{5(5+2)}=\sqrt{35} \mathrm{BM}\)

μ = 5.92 BM

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