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JEE Mains · Chemistry · STD 12 - 4. d and f- block elements

संकुल \(\left[ M \left( H _{2} O \right)_{6}\right] Cl _{2}\) के लिए धातु आयनों का युग्म जो \(3.9 \,BM\) का एक स्पिन मात्र चुम्बकीय आघूर्ण देता है, होगा

  1. A \(V^{2+}\) तथा \(Co^{2+}\)
  2. B \(V^{2+}\) तथा \(Fe^{2+}\)
  3. C \(Co^{2+}\) तथा \(Fe^{2+}\)
  4. D \(Cr^{2+}\) तथा \(Mn^{2+}\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(V^{2+}\) तथा \(Co^{2+}\)

Step-by-step Solution

Detailed explanation

\(H_2O\) is weak field ligand and magnetic moment \(=\) moment \(=\,\sqrt {n(n+2)} \,BM\) Solving for \('n'\) we get it as \(3;\) i.e., no. of unpaired electron \(=\,3\) \(F{e^{2 + }}\, = \,{t_{2g}}^4\,{e_g}^2\) \(C{o^{2 + }}\, = \,{t_{2g}}^5\,{e_g}^2\)…
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