Which of the following complexes has a magnet | vedclass

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(B) The magnetic moment $\mu$ is given by the formula $\mu = \sqrt{n(n+2)} \ B.M.$,where $n$ is the number of unpaired electrons.For $\mu = 2.82 \ B.M

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$[NiCl_4]^{2-}$

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(B) The magnetic moment $\mu$ is given by the formula $\mu = \sqrt{n(n+2)} \ B.M.$,where $n$ is the number of unpaired electrons.For $\mu = 2.82 \ B.M.$,$n$ must be $2$.In $[NiCl_4]^{2-}$,the oxidation state of $Ni$ is $+2$. The electronic configuration of $Ni^{2+}$ is $3d^8$.Since $Cl^-$ is a weak field ligand,it does not cause pairing of electrons in the $3d$ orbitals.Thus,the $3d^8$ configuration has $2$ unpaired electrons $(n=2)$.Therefore,$\mu = \sqrt{2(2+2)} = \sqrt{8} \approx 2.82 \ B.M.$

Which of the following complexes has a magnetic moment of $2.82 \ B.M.$?

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The observed magnetic moment of the complex $[Mn(NCS)_6]^{x-}$ is $6.06 \ BM$. The numerical value of $x$ is $.......$.

Which of the following complex compound$(s)$ is/are paramagnetic and low spin?
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Choose the correct code:

Coordination isomerism is formed by the interchange of ligands between which of the following?

Which of the following statements is $correct$?

The complex(es),which can exhibit the type of isomerism shown by $[Pt(NH_3)_2 Br_2]$,is(are) [en $= H_2 NCH_2 CH_2 NH_2$ ]
$(A)$ $[Pt(en)(SCN)_2]$
$(B)$ $[Zn(NH_3)_2 Cl_2]$
$(C)$ $[Pt(NH_3)_2 Cl_4]$
$(D)$ $[Cr(en)_2(H_2 O)(SO_4)]^{+}$

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