which one of the following high spin complexes has the largest crystal field stabilization energy?

1.  ${\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$

2.  ${\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$

3.  ${\left[\mathrm{Mn}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$

4.  ${\left[\mathrm{Mn}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$

It is an experimental fact that DMG + Ni(ll)salt + ${\mathrm{NH}}_4\mathrm{OH}$ $\to$ Red precipitate Which of the following is wrong about this red precipitate?

(1)  It is a non-ionic complex

(2)  It has a square planar geometry

(3)  It has tetrahedral geometry

(4)  It is a diamagnetic complex

Which among the following species is colored as per CFT?

1.  ${\left[\mathrm{Ti}{\left({\mathrm{H}}_2\mathrm{O}\right)}_5\right]}^{4+}$

2.  ${\left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$

3.  $\mathrm{K}\left[{\mathrm{VF}}_6\right]$

4.  ${\left({\mathrm{NH}}_4\right)}_2\left[{\mathrm{TiCl}}_6\right]$

$$\begin{gathered} \mathrm{Among} \left(\mathrm{i}\right) \left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]{\mathrm{CI}}_3,\left(\mathrm{ii}\right)\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_6\right]{\mathrm{CI}}_2,\left(\mathrm{iii}\right)\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]{\mathrm{CI}}_3,\left(\mathrm{iv}\right) \\ \left[\mathrm{Fe}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]{\mathrm{CI}}_2, \mathrm{the} \mathrm{diamagnetic} \mathrm{complex} \mathrm{is} \end{gathered}$$

1.  i

2.  ii

3.  iii

4.  iv

For which of the following complexes IUPAC names is not correctly assigned?

1.  $\mathrm{Na}\left[\mathrm{Pt}\left({\mathrm{NH}}_3\right)\mathrm{BrCl}\left({\mathrm{NO}}_2\right)\right]$-Sodium amminebromidochlorido nitrito-N-pIatinate(II)

2.  $\left[{\mathrm{CuCl}}_2{\left(\mathrm{O} = \mathrm{C}{\left({\mathrm{NH}}_2\right)}_2\right)}_2\right]$-Dichlorobis (dicarboxido tetraamine) copper (II)

3.   ${\left[{\mathrm{PtCl}}_3\left({\mathrm{\eta }}^2 - {\mathrm{C}}_2{\mathrm{H}}_4\right)\right]}^{-}$ —Trichlorido (${\mathrm{\eta }}^2$ — ethylene) platinate(ll) ion

4.  ${\left[\mathrm{Fe}\left(\mathrm{Cl}\right){\left(\mathrm{CN}\right)}_4\left({\mathrm{O}}_2\right)\right]}^{4-}$—Chloridotetracynosuperoxoferrate (II) ion

The number of isomers of $\left[\mathrm{Co}\left(\mathrm{dien}\right){\mathrm{CI}}_3\right]$ is (where 'dean' is diethylene triamine)

1.  2

2.  3

3.  44.  5

Choose the incorrect statement regarding the complex $\left[{\mathrm{NiCl}}_2{\left({\mathrm{PR}}_3\right)}_2\right]$
(1) When R group in ${\mathrm{PR}}_3$ is ${\mathrm{C}}_6{\mathrm{H}}_5$ then complex will be tetrahedral

(2) When R group in ${\mathrm{PR}}_3$ is cyclohexyl then complex will be square planar

(3) When R group is H then equilibrium mixture of tetrahedral and square planar form is obtained

(4) When R group is H then complex will be tetrahedral only

The incorrect statement about Re—Re bonding in ${\left[{\mathrm{Re}}_2{\mathrm{X}}_8\right]}^{2-}$ are,
(1) Re—Re bond length is abnormally short

(2) Re—Re bond is comprised of one G, two qt and
one ö—bond

(3) If Re—Re bond points along the z-axis, then the square planar ${\mathrm{ReX}}_4$ unit will use s, $P_x, P_y$and $d_{{\mathit{x}}^{\mathit{2}}\mathit{ }\mathit{-}\mathit{ }{\mathit{y}}^{\mathit{2}}}$ orbitals for the formation of four Re—X $\sigma$ bonds

(4) ${\mathrm{d}}_{\mathrm{xy}}$ orbitals will overlap to form $\delta$—bond

The Crystal Field Stabilization Energy (CFSE) and the spin-only magnetic moment in Bohr Magneton (BM) for the complex ${\mathrm{K}}_3\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]$ are, respectively,

1.  $0.0{∆}_0 \mathrm{and} \sqrt{35} \mathrm{BM}$

2.  $-2.0{∆}_0 \mathrm{and} \sqrt{3} \mathrm{BM}$

3.  $-0.4{∆}_0 \mathrm{and} \sqrt{24} \mathrm{BM}$

4.  $-2.4{∆}_0 \mathrm{and} \sqrt{0} \mathrm{BM}$

${\mathrm{Zn}}^{2+} + 4{\mathrm{NH}}_3 \rightleftharpoons {\left[\mathrm{Zn}{\left({\mathrm{NH}}_3\right)}_4\right]}^{2+}$. The concentration of free ${\mathrm{Zn}}^{2+}$ ions in a solution of the complex ion ${\left[\mathrm{Zn}{\left({\mathrm{NH}}_3\right)}_4\right]}^{2+}$ can be increased significantly by the addition of

1.  ${\mathrm{H}}_2\mathrm{O}$

2.  HCl(aq)

3.  ${\mathrm{NH}}_3\left(\mathrm{aq}\right)$

4.  ${\mathrm{NH}}_4\mathrm{Cl}\left(\mathrm{aq}\right)$