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

Other than the X-ray diffractions, how could be the following pairs of isomers be distinguished from one another by;

$\left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_6\right] \left[\mathrm{Cr}{\left({\mathrm{NO}}_2\right)}_6\right] \mathrm{and}$$\left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_4{\left({\mathrm{NO}}_2\right)}_2\right] \left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_2{\left({\mathrm{NO}}_2\right)}_4\right]$
1.  Cryoscopic method

2.  Measurement of molar conductance

3.  Measuring magnetic moments

4.  Observing their colors

The hybridizations of [Ni(CO)₄] and [Cr(H₂O)₆]³⁺, respectively, are : 

1. sp³ and d³sp²

2. dsp² and d²sp³

3. sp³ and d²sp³

4. dsp²  and sp³d²

Which of the following is true about the complex $\left[{\mathrm{PtCl}}_2\left({\mathrm{NH}}_3\right){\left({\mathrm{OH}}_2\right)}_{}\right]$; [Atomic number of Pt = 78]

I.  It will have two geometrical isomeric forms, cis and trans

II.  The hybridization state of Pt(ll) is ${\mathrm{sp}}^3$

III.  It is a square planar complex

IV.  It is a diamagnetic complex

V.  It can show hydrate isomerism

VI.  It is a tetrahedral complex

1.  I, III, IV

2.  II, IV, V

3.  II, V, IV

4.  I, V, IV

Amongst $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4$, ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ and [NiCl₄]^2- :

1.  $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4$ and ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$ are diamagnetic and ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ is paramagnetic.

2.  ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$ and ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ are diamagnetic and $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4$ is paramagnetic.

3.  $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4$ and ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ are diamagnetic and ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$ is paramagnetic.

4.  $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4$ is diamagnetic and ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$ and ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ are paramagnetic.

Which of the following statements is correct?

1.  a & c only

2.  b & c only

3.  a & b only

4. All of these

The correct electronic configuration for the complex [Ni(NH₃)₆]²⁺ is:

1. ${\mathrm{t}}_{2\mathrm{g}}^4 {\mathrm{e}}_{\mathrm{g}}^2$

2. ${\mathrm{t}}_{2\mathrm{g}}^6 {\mathrm{e}}_{\mathrm{g}}^2$

3. ${\mathrm{t}}_{2\mathrm{g}}^7 {\mathrm{e}}_{\mathrm{g}}^1$

4. ${\mathrm{t}}_{2\mathrm{g}}^4 {\mathrm{e}}_{\mathrm{g}}^4$

A compound is made by mixing cobalt (III) nitrite and potassium nitrite solution in a ratio of 1 : 3. The aqueous solution of the compound showed 4 particles per molecule whereas molar conductivity reveals the presence of six electrical charges. The formula of the compound is:

1. Co(NO₂)₃ · 2KNO₂

2. Co(NO₂)₃ · 3 KNO₂

3. K₃[Co(NO₂)₆]

4. K[Co(NO₂)₄]

0.001 mole of $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left({\mathrm{NO}}_3\right)·\left({\mathrm{SO}}_4\right)\right]$ was passed through a cation exchanger and the acid coming out of it required 20 ml of 0.1 M NaOH for neutralization. Hence, the complex is

1.  $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5{\mathrm{SO}}_4\right]{\mathrm{NO}}_3$

2.  $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left(N{O}_3\right)\right]{\mathrm{SO}}_4$

3.  $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5{\mathrm{SO}}_4\right]{\mathrm{NO}}_3{\mathrm{SO}}_4$

4.  All of these