Which one of the following species does not h | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The magnetic moment $\mu$ is given by $\sqrt{n(n+2)} \ BM$,where $n$ is the number of unpaired electrons. For $\mu = 1.73 \ BM$,$n$ must be $1$.$(

Vedclass · Accepted Answer

$CuI$

Vedclass · Answer

(A) The magnetic moment $\mu$ is given by $\sqrt{n(n+2)} \ BM$,where $n$ is the number of unpaired electrons. For $\mu = 1.73 \ BM$,$n$ must be $1$.$(1)$ $CuI$: In $CuI$,$Cu$ is in the $+1$ oxidation state $(Cu^{+})$. The electronic configuration of $Cu^{+}$ is $[Ar]3d^{10}$,which has $0$ unpaired electrons. Thus,$\mu = 0 \ BM$.$(2)$ $\left[Cu(NH_{3})_{4}\right]Cl_{2}$: Here,$Cu$ is in the $+2$ oxidation state $(Cu^{2+})$. The electronic configuration of $Cu^{2+}$ is $[Ar]3d^{9}$,which has $1$ unpaired electron. Thus,$\mu = \sqrt{1(1+2)} = 1.73 \ BM$.$(3)$ $O_{2}^{+}$: Total electrons = $15$. Molecular orbital configuration: $\sigma_{1s}^{2} \sigma_{1s}^{*2} \sigma_{2s}^{2} \sigma_{2s}^{*2} \sigma_{2pz}^{2} \pi_{2px}^{2} \pi_{2py}^{2} \pi_{2px}^{*1}$. It has $1$ unpaired electron. Thus,$\mu = 1.73 \ BM$.$(4)$ $O_{2}^{-}$: Total electrons = $17$. Molecular orbital configuration: $\sigma_{1s}^{2} \sigma_{1s}^{*2} \sigma_{2s}^{2} \sigma_{2s}^{*2} \sigma_{2pz}^{2} \pi_{2px}^{2} \pi_{2py}^{2} \pi_{2px}^{*2} \pi_{2py}^{*1}$. It has $1$ unpaired electron. Thus,$\mu = 1.73 \ BM$.Therefore,$CuI$ does not have a magnetic moment of $1.73 \ BM$.

Which one of the following species does not have a magnetic moment of $1.73 \ BM$ (spin only value)?

Similar Questions

Which one of the following complexes is not expected to exhibit isomerism?

Which of the following pairs has the same magnetic moment?

Which of the following compounds has a magnetic moment identical to $[Cr(H_{2}O)_{6}]^{3+}$?

Arrange the following in the increasing order of their magnetic moments:
$I.$ $[Mn(CN)_6]^{3-}$
$II.$ $[MnCl_6]^{3-}$
$III.$ $[Fe(CN)_6]^{3-}$
$IV.$ $[FeF_6]^{3-}$

The value of the 'spin only' magnetic moment for one of the following configurations is $2.84 \ BM$. The correct one is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module