Consider the following complexes:

1. K₂[PtCl₆]

2. PtCl₄.2NH₃ 

3. PtCl₄.3NH₃

4. PtCl₄.5NH₃

Their electrical conductances in aqueous solution respectively are:

1.	256, 0, 97, 404	2.	404, 0, 97, 256
3.	256, 97, 0, 404	4.	404, 97, 256, 0

Zero magnetic moment of the octahedral complex ${\mathrm{K}}_2\left[{\mathrm{NiF}}_6\right]$ is due to: 

1. Low spin ${\mathrm{d}}^6$ Ni(IV) complex

2. Low spin ${\mathrm{d}}^8$ Ni(ll) complex

3. High spin ${\mathrm{d}}^8$ Ni(ll) complex

4. High spin ${\mathrm{d}}^6$ Ni(IV) complex

Which of the following statements is not correct?

1.  The complexes ${\left[{\mathrm{Fe}}_{}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$ and ${\left[\mathrm{Fe}\left({\mathrm{CN}}_6\right)\right]}^{4-}$ differ in the state of hybridization of iron

2.  The complexes ${\left[{\mathrm{Fe}}_{}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$ and ${\left[\mathrm{Fe}\left({\mathrm{CN}}_6\right)\right]}^{4-}$ differ in the magnetic properties

3.  iron ion has the same secondary valency in the complexes ${\left[{\mathrm{Fe}}_{}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$ and 

4.   The complex ${\left[{\mathrm{Fe}}_{}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$ and ${\left[\mathrm{Fe}\left({\mathrm{CN}}_6\right)\right]}^{4-}$ differ in primary valency of iron

Choose the correct match.
 

$\left[\mathrm{Ni}{\left({\mathrm{PPh}}_3\right)}_4\right]$ and ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$have geometry, hybridization and magnetic moments of the ions respectively

1.  Tetrahedral, tetrahedral; ${\mathrm{sp}}^3, {\mathrm{sp}}^3$; O, 2.82

2.  Tetrahedral, square planar; ${\mathrm{sp}}^3, {\mathrm{dsp}}^2$; O, 2.82

3.  Tetrahedral, octahedral; ${\mathrm{sp}}^3, {\mathrm{d}}^2{\mathrm{sp}}^3$; 2.82, O

4.  Square planar, tetrahedral; ${\mathrm{dsp}}^2, {\mathrm{sp}}^3$; 2.82, 2.82

The geometries of [Ni(CO)₄] and are [Ni(PPh₃)₂Cl₂]  : 

1. Both square planar.

2. Tetrahedral and square planar, respectively.

3. Both tetrahedral.

4. Square planar and tetrahedral, respectively.

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

According to Crystal Field Theory (CFT), the compound, among the following, that forms a colored complex is:

1. [Ti(H₂O)₆]⁴⁺
2. [Cr(NH₃)₆]³⁺
3. K[V(F)₆]
4. (NH₄)₂[TiCl₆]

Among i. [Co(NH₃)₆]CI₃ , ii. [Ni(NH₃)₆]CI₂ , iii. Cr(H₂O)₆]CI₃ , iv. [Fe(H₂O)₆]CI₂, the diamagnetic complex is-

1. i

2. ii

3. iii

4. iv