Crystal Field Split in Octahedral Complexes

Q. Consider the following complex ions:
$P,Q,$ and $R$. $P=[Fe{F}_6{]}^{3-},Q=[V(H_{2}O{)}_6{]}^{2+}$ and $R=\left[Fe\right(H_{2}O{)}_6{]}^{2+}$
The correct order of the complex ions, according to their spin only magnetic moment values (in BM) is:

1. $Q<R<P$
2. $R<Q<P$
3. $R<P<Q$
4. $Q<P<R$

Q. The shortest distance between an octahedral and a tetrahedral void in FCC lattice would be

FCC जालक में अष्टफलकीय तथा चतुष्फलकीय रिक्ति के मध्य न्यूनतम दूरी होगी

1. $\sqrt{3}\text{a}$
2. $\frac{\sqrt{3}\text{a}}{2}$
3. $\frac{\sqrt{3}\text{a}}{3}$
4. $\frac{\sqrt{3}\text{a}}{4}$

Q. Match Column I with Column II.
$\begin{array}{cc}\text{Column - I}& \text{Column - II}\\ \text{(Complex ion)}& \text{(CFSE and hybridisation)}\\ a.{\left[Cr\right(N{H}_3{)}_6]}^{3+}& \left(P\right)0.0{\Delta }_0,s{p}^3{d}^2-\text{hybridisation}\\ b.{\left[Cu\right(N{H}_3{)}_6]}^{2+}& \left(Q\right)-0.6{\Delta }_0,s{p}^3{d}^2-\text{hybridisation}\\ c.{\left[Fe\right(H_{2}O{)}_6]}^{3+}& \left(R\right)-1.2{\Delta }_0,d^{2}s{p}^3-\text{hybridisation}\\ d.{\left[Ir{F}_6\right]}^{3-}& \left(S\right)\text{Diamagnetic}\\ & \left(T\right)\text{Paramagnetic}\end{array}$

1. a - R, T; b - Q, T; c - P, T; d - S
2. a - P, T; b - Q, T; c - T; d - S
3. a - R, T; b - P, T; c - P, S; d - S
4. a - Q, T; b - Q, T; c - P; d - S

Q. $\begin{array}{cc}\text{List - I}& \text{List - II}\\ \text{(Compound)}& \text{(Hybridisation)}\\ \text{(I)}\left[Fe\right(EDTA){]}^{-}& \text{(P)}s{p}^3{d}^2\\ \text{(II)}\left[Ni\right(CN{)}_4{]}^{2-}& \text{(Q)}s{p}^3\\ \text{(III)}[CuC{l}_4{]}^{2-}& \text{(R)}{d}^{3}s\\ \text{(IV)}\left[Fe\right(H_{2}O{)}_6{]}^{2-}& \text{(S)}{d}^{2}s{p}^3\\ & \text{(T)}ds{p}^2\\ & \text{(U)}s{p}^{3}d\end{array}$

Which of the following option has correct combination considering List-I and List-II?

1. $I\to S;III\to Q$
2. $I\to P;III\to Q$
3. $I\to P;III\to T$
4. $I\to S;III\to T$

Q. In the crystal field of the complex ${\left[Fe\right(Cl\left)\right(CN{)}_4\left(O_2\right)]}^{4-}$, the electronic configuration of the metal is found to be $t_{2g}^6{e}_g^0$. Which of the following is true about this complex ion?

1. It is a paramagnetic complex
2. $O-O$ bond length will be less than what is found in the $O_2$ molecule
3. Its IUPAC name will be chlorotetracyanosuperoxidoferrate(II) ion
4. It is a diamagnetic complex

Q. In hexacyanomanganate (II) ion, the $Mn$ atom assumes a $d^{2}s{p}^3-$ hybrid state. The number of unpaired electrons in the complex is:

1. 2
2. 3
3. 0
4. 1

Q. The tetrachloro complexes of $Ni\left(II\right)$ and $Pd\left(II\right)$ are respectively:

(atomic number of $Ni$ and $Pd$ are $28$ and $46$ respectively)

1. Diamagnetic and Diamagnetic
2. Paramagnetic and Paramagnetic
3. Diamagnetic and Paramagnetic
4. Paramagnetic and Diamagnetic

Q. Which of these statements about $\left[Co\right(CN{)}_6{]}^{3-}$ is true :-

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1. $\left[Co\right(CN{)}_6{]}^{3-}$ has no unpaired electrons and will be in a high-spin configuration.
2. $\left[Co\right(CN{)}_6{]}^{3-}$ has no unpaired electrons and will be in a low-spin configuration.
3. $\left[Co\right(CN{)}_6{]}^{3-}$ has four unpaired electrons and will be in a low-spin configuration.
4. $\left[Co\right(CN{)}_6{]}^{3-}$ has four unpaired electrons and will be in a high spin configuration.

Q. A d-block element forms an octahedral complex but its spin magnetic moment remains the same in the presence of both strong field and weak field ligands. Which of the following is/are correct?

1. It always forms colourless compounds
2. The number of electrons in $t_{2g}$ orbitals is more than those in $e_g$ orbitals
3. It can have either $d^3$ or $d^8$ configuration
4. It can have either $d^7$ or $d^8$configuration

Q. In the crystal field of the complex ${\left[Fe\right(Cl\left)\right(CN{)}_4\left(O_2\right)]}^{4-}$, the electronic configuration of the metal is found to be $t_{2g}^6{e}_g^0$. Which of the following is true about this complex ion?

1. It is a paramagnetic complex
2. $O-O$ bond length will be less than what is found in the $O_2$ molecule
3. Its IUPAC name will be chlorotetracyanosuperoxidoferrate(II) ion
4. It is a diamagnetic complex

Q.

Correct increasing order for the wavelengths of absorption in the visible region for the complexes of $C{o}^{3+}$ is

1. $\left[Co\right(en{)}_3{]}^{3+},\left[Co\right(N{H}_3{)}_6{]}^{3+},\left[Co\right(H_{2}O{)}_6{]}^{3+}$

2. $\left[Co\right(H_{2}O{)}_6{]}^{3+},\left[Co\right(en{)}_3{]}^{3+},\left[Co\right(N{H}_3{)}_6{]}^{3+}$

3. $\left[Co\right(H_{2}O{)}_6{]}^{3+},\left[Co\right(N{H}_3{)}_6{]}^{3+},\left[Co\right(en{)}_3{]}^{3+}$

4. $\left[Co\right(N{H}_3{)}_6{]}^{3+},\left[Co\right(en{)}_3{]}^{3+},\left[CO\right(H_{2}O{)}_6{]}^{3+}$

Q. The type of hybridisation and magnetic property of the complex $[MnC{l}_6{]}^{3-}$, respectively, are

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1. $d^{2}s{p}^3$ and paramagnetic
2. $s{p}^3{d}^2$ and diamagnetic
3. $s{p}^3{d}^2$ and paramagnetic
4. $d^{2}s{p}^3$ and diamagnetic

Q. Which of the following options are correct for $K_3\left[Fe\right(CN{)}_6]$ complex?

1. $d^{2}s{p}^3$ hybridisation state
2. $s{p}^3{d}^2$ hybridisation state
3. Paramagnetic
4. Diamagnetic

Q. If ${△}_0<P,$ where $P$ is pairing energy and ${△}_0$ is the crystal field spliting energy, the correct electronic configuration for $d^4$ system will be:

1. $t_{2g}^4{e}_g^0$
2. $t_{2g}^3{e}_g^1$
3. $t_{2g}^0{t}_g^4$
4. $t_{2g}^2{e}_g^2$

Q.

Select the correct order of magnetic moment (in B.M.) from the following options:

1. $[MnC{l}_4{]}^{2-}>[CoC{l}_4{]}^{2-}>\left[Fe\right(CN{)}_6{]}^{4-}$

2. $\left[Fe\right(CN{)}_6{]}^{4-}>[MnC{l}_4{]}^{2-}>[CoC{l}_4{]}^{2-}$

3. $\left[Fe\right(CN{)}_6{]}^{2-}>[CoC{l}_4{]}^{2-}>[MnC{l}_4{]}^{2-}$

4. $[MnC{l}_4{]}^{2-}>[Fe(CN{)}_6{]}^{4-}>[CoC{l}_4{]}^{2-}$

Q. The CFSE value of tetrahedral $[CoC{l}_4{]}^{2-}$ complex is:

1. $+2.4{\Delta }_t$
2. $-1.8{\Delta }_t$
3. $+1.2{\Delta }_t$
4. $-1.2{\Delta }_t$