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Question 860005
JEE Chemistry · Medium

d- and f-Block Elements: Magnetic properties MCQ

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Magnetic propertiesMediumQuestion 860005

Question

The spin-only magnetic moment formula is:
  1. A
    μ = √(n(n+2)) BM, where n = number of unpaired electrons
    Correct
  2. B
    μ = n BM
  3. C
    μ = 2n BM
  4. D
    μ = n(n+1) BM

Correct answer

μ = √(n(n+2)) BM, where n = number of unpaired electrons

Explanation

Spin-only magnetic moment: μ = √(n(n+2)) BM (Bohr magnetons), where n = number of unpaired electrons. For Fe³⁺ (d⁵, 5 unpaired): μ = √(5×7) = √35 ≈ 5.92 BM.

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