The correct match is: Complexes No. of | vedclass

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

Question

(A) $1$. For $A. [CrF_6]^{4-}$: $Cr^{2+}$ is $3d^4$. $F^-$ is a weak field ligand,so electrons remain unpaired. Unpaired electrons = $4$ $(S)$.$2$. Fo

Vedclass · Accepted Answer

$A-S, B-P, C-Q, D-R$

Vedclass · Answer

(A) $1$. For $A. [CrF_6]^{4-}$: $Cr^{2+}$ is $3d^4$. $F^-$ is a weak field ligand,so electrons remain unpaired. Unpaired electrons = $4$ $(S)$.$2$. For $B. [MnF_6]^{4-}$: $Mn^{2+}$ is $3d^5$. $F^-$ is a weak field ligand,so electrons remain unpaired. Unpaired electrons = $5$ $(P)$.$3$. For $C. [Cr(CN)_6]^{4-}$: $Cr^{2+}$ is $3d^4$. $CN^-$ is a strong field ligand,causing pairing. $t_{2g}^4 e_g^0$ configuration leads to $2$ unpaired electrons $(Q)$.$4$. For $D. [Mn(CN)_6]^{4-}$: $Mn^{2+}$ is $3d^5$. $CN^-$ is a strong field ligand,causing pairing. $t_{2g}^5 e_g^0$ configuration leads to $1$ unpaired electron $(R)$.Thus,the correct match is $A-S, B-P, C-Q, D-R$.

List-$I$ (Complex)	List-$II$ (Spin only magnetic moment in $B$.$M$.)
$A$. $[Cr(NH_3)_6]^{3+}$	$I$. $4.90$
$B$. $[NiCl_4]^{2-}$	$II$. $3.87$
$C$. $[CoF_6]^{3-}$	$III$. $0.0$
$D$. $[Ni(CN)_4]^{2-}$	$IV$. $2.83$

The correct match is:

Complexes No. of unpaired electrons

$A. [CrF_6]^{4-}$ $P. 5$

$B. [MnF_6]^{4-}$ $Q. 2$

$C. [Cr(CN)_6]^{4-}$ $R. 1$

$D. [Mn(CN)_6]^{4-}$ $S. 4$

Similar Questions

Number of complexes from the following with an even number of unpaired $d$ electrons is . . . . . . . . . .
$[V(H_2O)_6]^{3+}, \quad [Cr(H_2O)_6]^{2+}, \quad [Fe(H_2O)_6]^{3+}, \quad [Ni(H_2O)_6]^{3+}, \quad [Cu(H_2O)_6]^{2+}$
[Given atomic numbers: $V=23, Cr=24, Fe=26, Ni=28, Cu=29$]

Which of the following complexes will exhibit optical isomerism?

Other than $X$-ray diffraction,how can the following pairs of isomers be distinguished from one another?
$[Cr(NH_3)_6][Cr(NO_2)_6]$ and $[Cr(NH_3)_4(NO_2)_2][Cr(NH_3)_2(NO_2)_4]$

Which of the following compounds is diamagnetic?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Complexes	No. of unpaired electrons
$A. [CrF_6]^{4-}$	$P. 5$
$B. [MnF_6]^{4-}$	$Q. 2$
$C. [Cr(CN)_6]^{4-}$	$R. 1$
$D. [Mn(CN)_6]^{4-}$	$S. 4$

The correct match is: Complexes No. of unpaired electrons $A. [CrF_6]^{4-}$ $P. 5$ $B. [MnF_6]^{4-}$ $Q. 2$ $C. [Cr(CN)_6]^{4-}$ $R. 1$ $D. [Mn(CN)_6]^{4-}$ $S. 4$