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Question: Answered & Verified by Expert
The magnetic moment (spin only) of $\left[\mathrm{NiCl}_4\right]^{2-}$ is
ChemistryStructure of AtomJEE MainJEE Main 2011
Options:
  • A
    $5.46 \mathrm{BM}$
  • B
    $2.83 \mathrm{BM}$
  • C
    $1.41 \mathrm{BM}$
  • D
    $1.82 \mathrm{BM}$
Solution:
1160 Upvotes Verified Answer
The correct answer is:
$2.83 \mathrm{BM}$
In $\left[\mathrm{NiCl}_4\right]^{2-}, \mathrm{n}=2$
$\begin{aligned} \mu & =\sqrt{n(n+2)} \mathrm{BM} \\ & =\sqrt{2(2+2)}=2.82 \mathrm{BM}\end{aligned}$

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